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Finding the Fourth Proportional to 137,564.70, 206,347.05 and 102,572.70

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Solution

The fourth proportional to 137,564.70, 206,347.05 and 102,572.70 is: 153,859.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,564.70 : 206,347.05 = 102,572.70 : x
  2. Step 2: Convert to fraction form
    137,564.70/206,347.05 = 102,572.70/x
  3. Step 3: Cross multiply
    137,564.70x = 206,347.05 × 102,572.70
  4. Step 4: Simplify right side
    137,564.70x = 21,165,574,055.54
  5. Step 5: Solve for x
    x = 21,165,574,055.54/137,564.70
  6. Step 6: Final answer
    x = 153,859.05

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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.