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Finding the Fourth Proportional to 124,018.19, 185,879.66 and 86,374.47

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Solution

The fourth proportional to 124,018.19, 185,879.66 and 86,374.47 is: 129,458.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,018.19 : 185,879.66 = 86,374.47 : x
  2. Step 2: Convert to fraction form
    124,018.19/185,879.66 = 86,374.47/x
  3. Step 3: Cross multiply
    124,018.19x = 185,879.66 × 86,374.47
  4. Step 4: Simplify right side
    124,018.19x = 16,055,256,684.41
  5. Step 5: Solve for x
    x = 16,055,256,684.41/124,018.19
  6. Step 6: Final answer
    x = 129,458.89

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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.