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Finding the Fourth Proportional to 124,435.74, 186,840.53 and 71,187.84

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Solution

The fourth proportional to 124,435.74, 186,840.53 and 71,187.84 is: 106,888.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,435.74 : 186,840.53 = 71,187.84 : x
  2. Step 2: Convert to fraction form
    124,435.74/186,840.53 = 71,187.84/x
  3. Step 3: Cross multiply
    124,435.74x = 186,840.53 × 71,187.84
  4. Step 4: Simplify right side
    124,435.74x = 13,300,773,755.16
  5. Step 5: Solve for x
    x = 13,300,773,755.16/124,435.74
  6. Step 6: Final answer
    x = 106,888.69

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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.