Home / 138,426.12-191,032.02-77,997.48

Finding the Fourth Proportional to 138,426.12, 191,032.02 and 77,997.48

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Solution

The fourth proportional to 138,426.12, 191,032.02 and 77,997.48 is: 107,638.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,426.12 : 191,032.02 = 77,997.48 : x
  2. Step 2: Convert to fraction form
    138,426.12/191,032.02 = 77,997.48/x
  3. Step 3: Cross multiply
    138,426.12x = 191,032.02 × 77,997.48
  4. Step 4: Simplify right side
    138,426.12x = 14,900,016,159.31
  5. Step 5: Solve for x
    x = 14,900,016,159.31/138,426.12
  6. Step 6: Final answer
    x = 107,638.76

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1.5x scale

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.