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Finding the Fourth Proportional to 123,510.60, 170,444.79 and 66,921.93

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Solution

The fourth proportional to 123,510.60, 170,444.79 and 66,921.93 is: 92,352.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,510.60 : 170,444.79 = 66,921.93 : x
  2. Step 2: Convert to fraction form
    123,510.60/170,444.79 = 66,921.93/x
  3. Step 3: Cross multiply
    123,510.60x = 170,444.79 × 66,921.93
  4. Step 4: Simplify right side
    123,510.60x = 11,406,494,305.24
  5. Step 5: Solve for x
    x = 11,406,494,305.24/123,510.60
  6. Step 6: Final answer
    x = 92,352.35

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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.