Home / 121,162,687.20-181,744,030.80-72,789,746.40

Finding the Fourth Proportional to 121,162,687.20, 181,744,030.80 and 72,789,746.40

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Solution

The fourth proportional to 121,162,687.20, 181,744,030.80 and 72,789,746.40 is: 109,184,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,162,687.20 : 181,744,030.80 = 72,789,746.40 : x
  2. Step 2: Convert to fraction form
    121,162,687.20/181,744,030.80 = 72,789,746.40/x
  3. Step 3: Cross multiply
    121,162,687.20x = 181,744,030.80 × 72,789,746.40
  4. Step 4: Simplify right side
    121,162,687.20x = 13,229,101,911,645,792
  5. Step 5: Solve for x
    x = 13,229,101,911,645,792/121,162,687.20
  6. Step 6: Final answer
    x = 109,184,619.60

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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.