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Finding the Fourth Proportional to 83,385.56, 115,070.92 and 45,659.80

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Solution

The fourth proportional to 83,385.56, 115,070.92 and 45,659.80 is: 63,009.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,385.56 : 115,070.92 = 45,659.80 : x
  2. Step 2: Convert to fraction form
    83,385.56/115,070.92 = 45,659.80/x
  3. Step 3: Cross multiply
    83,385.56x = 115,070.92 × 45,659.80
  4. Step 4: Simplify right side
    83,385.56x = 5,254,115,193.02
  5. Step 5: Solve for x
    x = 5,254,115,193.02/83,385.56
  6. Step 6: Final answer
    x = 63,009.89

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1.5x scale

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.