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Finding the Fourth Proportional to 72,675,785.80, 109,013,678.70 and 56,551,472.20

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Solution

The fourth proportional to 72,675,785.80, 109,013,678.70 and 56,551,472.20 is: 84,827,208.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,675,785.80 : 109,013,678.70 = 56,551,472.20 : x
  2. Step 2: Convert to fraction form
    72,675,785.80/109,013,678.70 = 56,551,472.20/x
  3. Step 3: Cross multiply
    72,675,785.80x = 109,013,678.70 × 56,551,472.20
  4. Step 4: Simplify right side
    72,675,785.80x = 6,164,884,020,422,783
  5. Step 5: Solve for x
    x = 6,164,884,020,422,783/72,675,785.80
  6. Step 6: Final answer
    x = 84,827,208.30

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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.