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Finding the Fourth Proportional to 72,402.60, 108,701.10 and 46,223.40

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Solution

The fourth proportional to 72,402.60, 108,701.10 and 46,223.40 is: 69,397.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,402.60 : 108,701.10 = 46,223.40 : x
  2. Step 2: Convert to fraction form
    72,402.60/108,701.10 = 46,223.40/x
  3. Step 3: Cross multiply
    72,402.60x = 108,701.10 × 46,223.40
  4. Step 4: Simplify right side
    72,402.60x = 5,024,534,425.74
  5. Step 5: Solve for x
    x = 5,024,534,425.74/72,402.60
  6. Step 6: Final answer
    x = 69,397.15

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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.