Home / 138,727.91-191,445.38-78,301.10

Finding the Fourth Proportional to 138,727.91, 191,445.38 and 78,301.10

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Solution

The fourth proportional to 138,727.91, 191,445.38 and 78,301.10 is: 108,056.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,727.91 : 191,445.38 = 78,301.10 : x
  2. Step 2: Convert to fraction form
    138,727.91/191,445.38 = 78,301.10/x
  3. Step 3: Cross multiply
    138,727.91x = 191,445.38 × 78,301.10
  4. Step 4: Simplify right side
    138,727.91x = 14,990,382,495.19
  5. Step 5: Solve for x
    x = 14,990,382,495.19/138,727.91
  6. Step 6: Final answer
    x = 108,056.00

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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.