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Finding the Fourth Proportional to 74,019.20, 111,028.80 and 65,854.40

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Solution

The fourth proportional to 74,019.20, 111,028.80 and 65,854.40 is: 98,781.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,019.20 : 111,028.80 = 65,854.40 : x
  2. Step 2: Convert to fraction form
    74,019.20/111,028.80 = 65,854.40/x
  3. Step 3: Cross multiply
    74,019.20x = 111,028.80 × 65,854.40
  4. Step 4: Simplify right side
    74,019.20x = 7,311,735,006.72
  5. Step 5: Solve for x
    x = 7,311,735,006.72/74,019.20
  6. Step 6: Final answer
    x = 98,781.60

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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.