Home / 78,781.02-118,110.94-40,789.56

Finding the Fourth Proportional to 78,781.02, 118,110.94 and 40,789.56

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Solution

The fourth proportional to 78,781.02, 118,110.94 and 40,789.56 is: 61,152.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,781.02 : 118,110.94 = 40,789.56 : x
  2. Step 2: Convert to fraction form
    78,781.02/118,110.94 = 40,789.56/x
  3. Step 3: Cross multiply
    78,781.02x = 118,110.94 × 40,789.56
  4. Step 4: Simplify right side
    78,781.02x = 4,817,693,273.79
  5. Step 5: Solve for x
    x = 4,817,693,273.79/78,781.02
  6. Step 6: Final answer
    x = 61,152.97

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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.