Home / 121,140,007.20-181,710,010.80-72,767,066.40

Finding the Fourth Proportional to 121,140,007.20, 181,710,010.80 and 72,767,066.40

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Solution

The fourth proportional to 121,140,007.20, 181,710,010.80 and 72,767,066.40 is: 109,150,599.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,140,007.20 : 181,710,010.80 = 72,767,066.40 : x
  2. Step 2: Convert to fraction form
    121,140,007.20/181,710,010.80 = 72,767,066.40/x
  3. Step 3: Cross multiply
    121,140,007.20x = 181,710,010.80 × 72,767,066.40
  4. Step 4: Simplify right side
    121,140,007.20x = 13,222,504,421,428,320
  5. Step 5: Solve for x
    x = 13,222,504,421,428,320/121,140,007.20
  6. Step 6: Final answer
    x = 109,150,599.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.