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Finding the Fourth Proportional to 38,416,978.35, 57,599,869.91 and 21,153,308.76

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Solution

The fourth proportional to 38,416,978.35, 57,599,869.91 and 21,153,308.76 is: 31,715,868.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,416,978.35 : 57,599,869.91 = 21,153,308.76 : x
  2. Step 2: Convert to fraction form
    38,416,978.35/57,599,869.91 = 21,153,308.76/x
  3. Step 3: Cross multiply
    38,416,978.35x = 57,599,869.91 × 21,153,308.76
  4. Step 4: Simplify right side
    38,416,978.35x = 1,218,427,832,636,297
  5. Step 5: Solve for x
    x = 1,218,427,832,636,297/38,416,978.35
  6. Step 6: Final answer
    x = 31,715,868.48

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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.