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Finding the Fourth Proportional to 127,988.24, 176,541.54 and 77,687.24

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Solution

The fourth proportional to 127,988.24, 176,541.54 and 77,687.24 is: 107,158.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,988.24 : 176,541.54 = 77,687.24 : x
  2. Step 2: Convert to fraction form
    127,988.24/176,541.54 = 77,687.24/x
  3. Step 3: Cross multiply
    127,988.24x = 176,541.54 × 77,687.24
  4. Step 4: Simplify right side
    127,988.24x = 13,715,024,987.95
  5. Step 5: Solve for x
    x = 13,715,024,987.95/127,988.24
  6. Step 6: Final answer
    x = 107,158.48

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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.