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Finding the Fourth Proportional to 124,493.60, 186,934.80 and 72,005.60

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Solution

The fourth proportional to 124,493.60, 186,934.80 and 72,005.60 is: 108,120.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,493.60 : 186,934.80 = 72,005.60 : x
  2. Step 2: Convert to fraction form
    124,493.60/186,934.80 = 72,005.60/x
  3. Step 3: Cross multiply
    124,493.60x = 186,934.80 × 72,005.60
  4. Step 4: Simplify right side
    124,493.60x = 13,460,352,434.88
  5. Step 5: Solve for x
    x = 13,460,352,434.88/124,493.60
  6. Step 6: Final answer
    x = 108,120.84

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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.