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Finding the Fourth Proportional to 159,862.60, 239,880.30 and 71,129.80

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Solution

The fourth proportional to 159,862.60, 239,880.30 and 71,129.80 is: 106,733.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,862.60 : 239,880.30 = 71,129.80 : x
  2. Step 2: Convert to fraction form
    159,862.60/239,880.30 = 71,129.80/x
  3. Step 3: Cross multiply
    159,862.60x = 239,880.30 × 71,129.80
  4. Step 4: Simplify right side
    159,862.60x = 17,062,637,762.94
  5. Step 5: Solve for x
    x = 17,062,637,762.94/159,862.60
  6. Step 6: Final answer
    x = 106,733.14

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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.