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Finding the Fourth Proportional to 124,492.60, 186,738.90 and 85,126.60

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Solution

The fourth proportional to 124,492.60, 186,738.90 and 85,126.60 is: 127,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,492.60 : 186,738.90 = 85,126.60 : x
  2. Step 2: Convert to fraction form
    124,492.60/186,738.90 = 85,126.60/x
  3. Step 3: Cross multiply
    124,492.60x = 186,738.90 × 85,126.60
  4. Step 4: Simplify right side
    124,492.60x = 15,896,447,644.74
  5. Step 5: Solve for x
    x = 15,896,447,644.74/124,492.60
  6. Step 6: Final answer
    x = 127,689.90

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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.