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Finding the Fourth Proportional to 99,287.66, 137,014.53 and 56,842.58

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Solution

The fourth proportional to 99,287.66, 137,014.53 and 56,842.58 is: 78,441.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,287.66 : 137,014.53 = 56,842.58 : x
  2. Step 2: Convert to fraction form
    99,287.66/137,014.53 = 56,842.58/x
  3. Step 3: Cross multiply
    99,287.66x = 137,014.53 × 56,842.58
  4. Step 4: Simplify right side
    99,287.66x = 7,788,259,382.69
  5. Step 5: Solve for x
    x = 7,788,259,382.69/99,287.66
  6. Step 6: Final answer
    x = 78,441.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.