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Finding the Fourth Proportional to 124,491.60, 186,715.80 and 45,565.20

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Solution

The fourth proportional to 124,491.60, 186,715.80 and 45,565.20 is: 68,339.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,491.60 : 186,715.80 = 45,565.20 : x
  2. Step 2: Convert to fraction form
    124,491.60/186,715.80 = 45,565.20/x
  3. Step 3: Cross multiply
    124,491.60x = 186,715.80 × 45,565.20
  4. Step 4: Simplify right side
    124,491.60x = 8,507,742,770.16
  5. Step 5: Solve for x
    x = 8,507,742,770.16/124,491.60
  6. Step 6: Final answer
    x = 68,339.89

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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.