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Finding the Fourth Proportional to 124,518.60, 186,972.30 and 72,030.60

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Solution

The fourth proportional to 124,518.60, 186,972.30 and 72,030.60 is: 108,158.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,518.60 : 186,972.30 = 72,030.60 : x
  2. Step 2: Convert to fraction form
    124,518.60/186,972.30 = 72,030.60/x
  3. Step 3: Cross multiply
    124,518.60x = 186,972.30 × 72,030.60
  4. Step 4: Simplify right side
    124,518.60x = 13,467,726,952.38
  5. Step 5: Solve for x
    x = 13,467,726,952.38/124,518.60
  6. Step 6: Final answer
    x = 108,158.36

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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.