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Finding the Fourth Proportional to 124,491.60, 186,931.80 and 72,003.60

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Solution

The fourth proportional to 124,491.60, 186,931.80 and 72,003.60 is: 108,117.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,491.60 : 186,931.80 = 72,003.60 : x
  2. Step 2: Convert to fraction form
    124,491.60/186,931.80 = 72,003.60/x
  3. Step 3: Cross multiply
    124,491.60x = 186,931.80 × 72,003.60
  4. Step 4: Simplify right side
    124,491.60x = 13,459,762,554.48
  5. Step 5: Solve for x
    x = 13,459,762,554.48/124,491.60
  6. Step 6: Final answer
    x = 108,117.84

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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.