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Finding the Fourth Proportional to 153,042.70, 229,564.05 and 90,834.70

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Solution

The fourth proportional to 153,042.70, 229,564.05 and 90,834.70 is: 136,252.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,042.70 : 229,564.05 = 90,834.70 : x
  2. Step 2: Convert to fraction form
    153,042.70/229,564.05 = 90,834.70/x
  3. Step 3: Cross multiply
    153,042.70x = 229,564.05 × 90,834.70
  4. Step 4: Simplify right side
    153,042.70x = 20,852,381,612.54
  5. Step 5: Solve for x
    x = 20,852,381,612.54/153,042.70
  6. Step 6: Final answer
    x = 136,252.05

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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.