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Finding the Fourth Proportional to 72,088.60, 108,132.90 and 45,909.40

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Solution

The fourth proportional to 72,088.60, 108,132.90 and 45,909.40 is: 68,864.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,088.60 : 108,132.90 = 45,909.40 : x
  2. Step 2: Convert to fraction form
    72,088.60/108,132.90 = 45,909.40/x
  3. Step 3: Cross multiply
    72,088.60x = 108,132.90 × 45,909.40
  4. Step 4: Simplify right side
    72,088.60x = 4,964,316,559.26
  5. Step 5: Solve for x
    x = 4,964,316,559.26/72,088.60
  6. Step 6: Final answer
    x = 68,864.10

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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.