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Finding the Fourth Proportional to 85,242.71, 117,685.35 and 75,785.11

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Solution

The fourth proportional to 85,242.71, 117,685.35 and 75,785.11 is: 104,628.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,242.71 : 117,685.35 = 75,785.11 : x
  2. Step 2: Convert to fraction form
    85,242.71/117,685.35 = 75,785.11/x
  3. Step 3: Cross multiply
    85,242.71x = 117,685.35 × 75,785.11
  4. Step 4: Simplify right side
    85,242.71x = 8,918,796,227.79
  5. Step 5: Solve for x
    x = 8,918,796,227.79/85,242.71
  6. Step 6: Final answer
    x = 104,628.26

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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.