Home / 138,662.47-191,356.73-81,342.91

Finding the Fourth Proportional to 138,662.47, 191,356.73 and 81,342.91

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Solution

The fourth proportional to 138,662.47, 191,356.73 and 81,342.91 is: 112,254.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,662.47 : 191,356.73 = 81,342.91 : x
  2. Step 2: Convert to fraction form
    138,662.47/191,356.73 = 81,342.91/x
  3. Step 3: Cross multiply
    138,662.47x = 191,356.73 × 81,342.91
  4. Step 4: Simplify right side
    138,662.47x = 15,565,513,266.28
  5. Step 5: Solve for x
    x = 15,565,513,266.28/138,662.47
  6. Step 6: Final answer
    x = 112,254.69

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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.