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Finding the Fourth Proportional to 122,754.40, 169,275.12 and 86,934.88

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Solution

The fourth proportional to 122,754.40, 169,275.12 and 86,934.88 is: 119,880.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,754.40 : 169,275.12 = 86,934.88 : x
  2. Step 2: Convert to fraction form
    122,754.40/169,275.12 = 86,934.88/x
  3. Step 3: Cross multiply
    122,754.40x = 169,275.12 × 86,934.88
  4. Step 4: Simplify right side
    122,754.40x = 14,715,912,244.19
  5. Step 5: Solve for x
    x = 14,715,912,244.19/122,754.40
  6. Step 6: Final answer
    x = 119,880.93

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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.