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Finding the Fourth Proportional to 124,780.60, 186,782.10 and 89,788.60

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Solution

The fourth proportional to 124,780.60, 186,782.10 and 89,788.60 is: 134,403.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,780.60 : 186,782.10 = 89,788.60 : x
  2. Step 2: Convert to fraction form
    124,780.60/186,782.10 = 89,788.60/x
  3. Step 3: Cross multiply
    124,780.60x = 186,782.10 × 89,788.60
  4. Step 4: Simplify right side
    124,780.60x = 16,770,903,264.06
  5. Step 5: Solve for x
    x = 16,770,903,264.06/124,780.60
  6. Step 6: Final answer
    x = 134,403.13

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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.