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Finding the Fourth Proportional to 103,130.43, 154,695.76 and 28,251.22

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Solution

The fourth proportional to 103,130.43, 154,695.76 and 28,251.22 is: 42,376.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,130.43 : 154,695.76 = 28,251.22 : x
  2. Step 2: Convert to fraction form
    103,130.43/154,695.76 = 28,251.22/x
  3. Step 3: Cross multiply
    103,130.43x = 154,695.76 × 28,251.22
  4. Step 4: Simplify right side
    103,130.43x = 4,370,343,948.83
  5. Step 5: Solve for x
    x = 4,370,343,948.83/103,130.43
  6. Step 6: Final answer
    x = 42,376.86

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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.