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Finding the Fourth Proportional to 72,605,728.80, 108,908,593.20 and 56,166,487.20

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Solution

The fourth proportional to 72,605,728.80, 108,908,593.20 and 56,166,487.20 is: 84,249,730.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,605,728.80 : 108,908,593.20 = 56,166,487.20 : x
  2. Step 2: Convert to fraction form
    72,605,728.80/108,908,593.20 = 56,166,487.20/x
  3. Step 3: Cross multiply
    72,605,728.80x = 108,908,593.20 × 56,166,487.20
  4. Step 4: Simplify right side
    72,605,728.80x = 6,117,013,105,937,808
  5. Step 5: Solve for x
    x = 6,117,013,105,937,808/72,605,728.80
  6. Step 6: Final answer
    x = 84,249,730.80

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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.