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Finding the Fourth Proportional to 85,612.54, 118,258.19 and 65,715.29

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Solution

The fourth proportional to 85,612.54, 118,258.19 and 65,715.29 is: 90,773.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,612.54 : 118,258.19 = 65,715.29 : x
  2. Step 2: Convert to fraction form
    85,612.54/118,258.19 = 65,715.29/x
  3. Step 3: Cross multiply
    85,612.54x = 118,258.19 × 65,715.29
  4. Step 4: Simplify right side
    85,612.54x = 7,771,371,250.73
  5. Step 5: Solve for x
    x = 7,771,371,250.73/85,612.54
  6. Step 6: Final answer
    x = 90,773.75

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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.