Home / 131,428.18-181,370.72-70,998.80

Finding the Fourth Proportional to 131,428.18, 181,370.72 and 70,998.80

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Solution

The fourth proportional to 131,428.18, 181,370.72 and 70,998.80 is: 97,978.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,428.18 : 181,370.72 = 70,998.80 : x
  2. Step 2: Convert to fraction form
    131,428.18/181,370.72 = 70,998.80/x
  3. Step 3: Cross multiply
    131,428.18x = 181,370.72 × 70,998.80
  4. Step 4: Simplify right side
    131,428.18x = 12,877,103,475.14
  5. Step 5: Solve for x
    x = 12,877,103,475.14/131,428.18
  6. Step 6: Final answer
    x = 97,978.25

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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.