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Finding the Fourth Proportional to 85,641.92, 118,298.80 and 65,744.68

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Solution

The fourth proportional to 85,641.92, 118,298.80 and 65,744.68 is: 90,814.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,641.92 : 118,298.80 = 65,744.68 : x
  2. Step 2: Convert to fraction form
    85,641.92/118,298.80 = 65,744.68/x
  3. Step 3: Cross multiply
    85,641.92x = 118,298.80 × 65,744.68
  4. Step 4: Simplify right side
    85,641.92x = 7,777,516,750.38
  5. Step 5: Solve for x
    x = 7,777,516,750.38/85,641.92
  6. Step 6: Final answer
    x = 90,814.37

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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.