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Finding the Fourth Proportional to 137,430.16, 205,730.26 and 124,288.72

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Solution

The fourth proportional to 137,430.16, 205,730.26 and 124,288.72 is: 186,057.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,430.16 : 205,730.26 = 124,288.72 : x
  2. Step 2: Convert to fraction form
    137,430.16/205,730.26 = 124,288.72/x
  3. Step 3: Cross multiply
    137,430.16x = 205,730.26 × 124,288.72
  4. Step 4: Simplify right side
    137,430.16x = 25,569,950,680.67
  5. Step 5: Solve for x
    x = 25,569,950,680.67/137,430.16
  6. Step 6: Final answer
    x = 186,057.78

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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.