Home / 78,530.90-108,373.65-42,721.88

Finding the Fourth Proportional to 78,530.90, 108,373.65 and 42,721.88

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Solution

The fourth proportional to 78,530.90, 108,373.65 and 42,721.88 is: 58,956.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,530.90 : 108,373.65 = 42,721.88 : x
  2. Step 2: Convert to fraction form
    78,530.90/108,373.65 = 42,721.88/x
  3. Step 3: Cross multiply
    78,530.90x = 108,373.65 × 42,721.88
  4. Step 4: Simplify right side
    78,530.90x = 4,629,926,070.46
  5. Step 5: Solve for x
    x = 4,629,926,070.46/78,530.90
  6. Step 6: Final answer
    x = 58,956.74

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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.