Home / 107,931.80-161,897.70-84,312.20

Finding the Fourth Proportional to 107,931.80, 161,897.70 and 84,312.20

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Solution

The fourth proportional to 107,931.80, 161,897.70 and 84,312.20 is: 126,468.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,931.80 : 161,897.70 = 84,312.20 : x
  2. Step 2: Convert to fraction form
    107,931.80/161,897.70 = 84,312.20/x
  3. Step 3: Cross multiply
    107,931.80x = 161,897.70 × 84,312.20
  4. Step 4: Simplify right side
    107,931.80x = 13,649,951,261.94
  5. Step 5: Solve for x
    x = 13,649,951,261.94/107,931.80
  6. Step 6: Final answer
    x = 126,468.30

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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.