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Finding the Fourth Proportional to 72,675,772.80, 109,013,659.20 and 56,551,459.20

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Solution

The fourth proportional to 72,675,772.80, 109,013,659.20 and 56,551,459.20 is: 84,827,188.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,675,772.80 : 109,013,659.20 = 56,551,459.20 : x
  2. Step 2: Convert to fraction form
    72,675,772.80/109,013,659.20 = 56,551,459.20/x
  3. Step 3: Cross multiply
    72,675,772.80x = 109,013,659.20 × 56,551,459.20
  4. Step 4: Simplify right side
    72,675,772.80x = 6,164,881,500,491,505
  5. Step 5: Solve for x
    x = 6,164,881,500,491,505/72,675,772.80
  6. Step 6: Final answer
    x = 84,827,188.80

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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.