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Finding the Fourth Proportional to 122,988.78, 169,772.13 and 96,139.98

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Solution

The fourth proportional to 122,988.78, 169,772.13 and 96,139.98 is: 132,710.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,988.78 : 169,772.13 = 96,139.98 : x
  2. Step 2: Convert to fraction form
    122,988.78/169,772.13 = 96,139.98/x
  3. Step 3: Cross multiply
    122,988.78x = 169,772.13 × 96,139.98
  4. Step 4: Simplify right side
    122,988.78x = 16,321,889,182.76
  5. Step 5: Solve for x
    x = 16,321,889,182.76/122,988.78
  6. Step 6: Final answer
    x = 132,710.39

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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.