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Finding the Fourth Proportional to 169,712.52, 254,666.70 and 90,870.72

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Solution

The fourth proportional to 169,712.52, 254,666.70 and 90,870.72 is: 136,358.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,712.52 : 254,666.70 = 90,870.72 : x
  2. Step 2: Convert to fraction form
    169,712.52/254,666.70 = 90,870.72/x
  3. Step 3: Cross multiply
    169,712.52x = 254,666.70 × 90,870.72
  4. Step 4: Simplify right side
    169,712.52x = 23,141,746,389.02
  5. Step 5: Solve for x
    x = 23,141,746,389.02/169,712.52
  6. Step 6: Final answer
    x = 136,358.51

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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.