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Finding the Fourth Proportional to 72,423,364.80, 108,635,047.20 and 31,502,407.80

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Solution

The fourth proportional to 72,423,364.80, 108,635,047.20 and 31,502,407.80 is: 47,253,611.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,423,364.80 : 108,635,047.20 = 31,502,407.80 : x
  2. Step 2: Convert to fraction form
    72,423,364.80/108,635,047.20 = 31,502,407.80/x
  3. Step 3: Cross multiply
    72,423,364.80x = 108,635,047.20 × 31,502,407.80
  4. Step 4: Simplify right side
    72,423,364.80x = 3,422,265,558,266,648.50
  5. Step 5: Solve for x
    x = 3,422,265,558,266,648.50/72,423,364.80
  6. Step 6: Final answer
    x = 47,253,611.70

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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.