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Finding the Fourth Proportional to 121,017.60, 181,483.20 and 42,134.40

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Solution

The fourth proportional to 121,017.60, 181,483.20 and 42,134.40 is: 63,186.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,017.60 : 181,483.20 = 42,134.40 : x
  2. Step 2: Convert to fraction form
    121,017.60/181,483.20 = 42,134.40/x
  3. Step 3: Cross multiply
    121,017.60x = 181,483.20 × 42,134.40
  4. Step 4: Simplify right side
    121,017.60x = 7,646,685,742.08
  5. Step 5: Solve for x
    x = 7,646,685,742.08/121,017.60
  6. Step 6: Final answer
    x = 63,186.56

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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.