Home / 128,741.98-177,663.90-71,381.12

Finding the Fourth Proportional to 128,741.98, 177,663.90 and 71,381.12

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Solution

The fourth proportional to 128,741.98, 177,663.90 and 71,381.12 is: 98,505.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,741.98 : 177,663.90 = 71,381.12 : x
  2. Step 2: Convert to fraction form
    128,741.98/177,663.90 = 71,381.12/x
  3. Step 3: Cross multiply
    128,741.98x = 177,663.90 × 71,381.12
  4. Step 4: Simplify right side
    128,741.98x = 12,681,848,165.57
  5. Step 5: Solve for x
    x = 12,681,848,165.57/128,741.98
  6. Step 6: Final answer
    x = 98,505.93

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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.