Home / 78,011,531.58-107,659,403.92-42,731,819.58

Finding the Fourth Proportional to 78,011,531.58, 107,659,403.92 and 42,731,819.58

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Solution

The fourth proportional to 78,011,531.58, 107,659,403.92 and 42,731,819.58 is: 58,971,822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,011,531.58 : 107,659,403.92 = 42,731,819.58 : x
  2. Step 2: Convert to fraction form
    78,011,531.58/107,659,403.92 = 42,731,819.58/x
  3. Step 3: Cross multiply
    78,011,531.58x = 107,659,403.92 × 42,731,819.58
  4. Step 4: Simplify right side
    78,011,531.58x = 4,600,482,224,399,785
  5. Step 5: Solve for x
    x = 4,600,482,224,399,785/78,011,531.58
  6. Step 6: Final answer
    x = 58,971,822.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.