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Finding the Fourth Proportional to 72,425,400.90, 108,638,101.35 and 43,656,728.10

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Solution

The fourth proportional to 72,425,400.90, 108,638,101.35 and 43,656,728.10 is: 65,485,092.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,425,400.90 : 108,638,101.35 = 43,656,728.10 : x
  2. Step 2: Convert to fraction form
    72,425,400.90/108,638,101.35 = 43,656,728.10/x
  3. Step 3: Cross multiply
    72,425,400.90x = 108,638,101.35 × 43,656,728.10
  4. Step 4: Simplify right side
    72,425,400.90x = 4,742,784,051,937,193
  5. Step 5: Solve for x
    x = 4,742,784,051,937,193/72,425,400.90
  6. Step 6: Final answer
    x = 65,485,092.15

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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.