Home / 78,543.41-108,390.35-42,733.66

Finding the Fourth Proportional to 78,543.41, 108,390.35 and 42,733.66

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Solution

The fourth proportional to 78,543.41, 108,390.35 and 42,733.66 is: 58,972.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,543.41 : 108,390.35 = 42,733.66 : x
  2. Step 2: Convert to fraction form
    78,543.41/108,390.35 = 42,733.66/x
  3. Step 3: Cross multiply
    78,543.41x = 108,390.35 × 42,733.66
  4. Step 4: Simplify right side
    78,543.41x = 4,631,916,403.27
  5. Step 5: Solve for x
    x = 4,631,916,403.27/78,543.41
  6. Step 6: Final answer
    x = 58,972.70

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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.