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Finding the Fourth Proportional to 123,643.77, 185,502.62 and 87,689.49

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Solution

The fourth proportional to 123,643.77, 185,502.62 and 87,689.49 is: 131,560.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,643.77 : 185,502.62 = 87,689.49 : x
  2. Step 2: Convert to fraction form
    123,643.77/185,502.62 = 87,689.49/x
  3. Step 3: Cross multiply
    123,643.77x = 185,502.62 × 87,689.49
  4. Step 4: Simplify right side
    123,643.77x = 16,266,629,703.02
  5. Step 5: Solve for x
    x = 16,266,629,703.02/123,643.77
  6. Step 6: Final answer
    x = 131,560.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.