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Finding the Fourth Proportional to 124,761.43, 186,870.96 and 77,388.16

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Solution

The fourth proportional to 124,761.43, 186,870.96 and 77,388.16 is: 115,914.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,761.43 : 186,870.96 = 77,388.16 : x
  2. Step 2: Convert to fraction form
    124,761.43/186,870.96 = 77,388.16/x
  3. Step 3: Cross multiply
    124,761.43x = 186,870.96 × 77,388.16
  4. Step 4: Simplify right side
    124,761.43x = 14,461,599,751.83
  5. Step 5: Solve for x
    x = 14,461,599,751.83/124,761.43
  6. Step 6: Final answer
    x = 115,914.03

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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.