Home / 138,769.98-191,502.27-78,353.16

Finding the Fourth Proportional to 138,769.98, 191,502.27 and 78,353.16

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Solution

The fourth proportional to 138,769.98, 191,502.27 and 78,353.16 is: 108,127.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,769.98 : 191,502.27 = 78,353.16 : x
  2. Step 2: Convert to fraction form
    138,769.98/191,502.27 = 78,353.16/x
  3. Step 3: Cross multiply
    138,769.98x = 191,502.27 × 78,353.16
  4. Step 4: Simplify right side
    138,769.98x = 15,004,808,001.67
  5. Step 5: Solve for x
    x = 15,004,808,001.67/138,769.98
  6. Step 6: Final answer
    x = 108,127.19

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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.