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Finding the Fourth Proportional to 123,686.75, 170,688.05 and 67,098.13

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Solution

The fourth proportional to 123,686.75, 170,688.05 and 67,098.13 is: 92,595.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,686.75 : 170,688.05 = 67,098.13 : x
  2. Step 2: Convert to fraction form
    123,686.75/170,688.05 = 67,098.13/x
  3. Step 3: Cross multiply
    123,686.75x = 170,688.05 × 67,098.13
  4. Step 4: Simplify right side
    123,686.75x = 11,452,848,968.35
  5. Step 5: Solve for x
    x = 11,452,848,968.35/123,686.75
  6. Step 6: Final answer
    x = 92,595.60

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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.