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Finding the Fourth Proportional to 123,197.76, 170,074.08 and 77,915.52

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Solution

The fourth proportional to 123,197.76, 170,074.08 and 77,915.52 is: 107,562.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,197.76 : 170,074.08 = 77,915.52 : x
  2. Step 2: Convert to fraction form
    123,197.76/170,074.08 = 77,915.52/x
  3. Step 3: Cross multiply
    123,197.76x = 170,074.08 × 77,915.52
  4. Step 4: Simplify right side
    123,197.76x = 13,251,410,381.72
  5. Step 5: Solve for x
    x = 13,251,410,381.72/123,197.76
  6. Step 6: Final answer
    x = 107,562.10

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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.