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Finding the Fourth Proportional to 72,415,108.80, 108,748,634.40 and 38,402,884.80

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Solution

The fourth proportional to 72,415,108.80, 108,748,634.40 and 38,402,884.80 is: 57,671,131.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,415,108.80 : 108,748,634.40 = 38,402,884.80 : x
  2. Step 2: Convert to fraction form
    72,415,108.80/108,748,634.40 = 38,402,884.80/x
  3. Step 3: Cross multiply
    72,415,108.80x = 108,748,634.40 × 38,402,884.80
  4. Step 4: Simplify right side
    72,415,108.80x = 4,176,261,279,020,517
  5. Step 5: Solve for x
    x = 4,176,261,279,020,517/72,415,108.80
  6. Step 6: Final answer
    x = 57,671,131.73

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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.