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Finding the Fourth Proportional to 124,316.80, 186,475.20 and 90,491.20

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Solution

The fourth proportional to 124,316.80, 186,475.20 and 90,491.20 is: 135,736.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,316.80 : 186,475.20 = 90,491.20 : x
  2. Step 2: Convert to fraction form
    124,316.80/186,475.20 = 90,491.20/x
  3. Step 3: Cross multiply
    124,316.80x = 186,475.20 × 90,491.20
  4. Step 4: Simplify right side
    124,316.80x = 16,874,364,618.24
  5. Step 5: Solve for x
    x = 16,874,364,618.24/124,316.80
  6. Step 6: Final answer
    x = 135,736.80

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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.