Home / 142,117.10-212,766.05-86,821.10

Finding the Fourth Proportional to 142,117.10, 212,766.05 and 86,821.10

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Solution

The fourth proportional to 142,117.10, 212,766.05 and 86,821.10 is: 129,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,117.10 : 212,766.05 = 86,821.10 : x
  2. Step 2: Convert to fraction form
    142,117.10/212,766.05 = 86,821.10/x
  3. Step 3: Cross multiply
    142,117.10x = 212,766.05 × 86,821.10
  4. Step 4: Simplify right side
    142,117.10x = 18,472,582,503.66
  5. Step 5: Solve for x
    x = 18,472,582,503.66/142,117.10
  6. Step 6: Final answer
    x = 129,981.42

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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.