Home / 127,531.15-191,132.70-77,558.20

Finding the Fourth Proportional to 127,531.15, 191,132.70 and 77,558.20

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Solution

The fourth proportional to 127,531.15, 191,132.70 and 77,558.20 is: 116,237.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,531.15 : 191,132.70 = 77,558.20 : x
  2. Step 2: Convert to fraction form
    127,531.15/191,132.70 = 77,558.20/x
  3. Step 3: Cross multiply
    127,531.15x = 191,132.70 × 77,558.20
  4. Step 4: Simplify right side
    127,531.15x = 14,823,908,173.14
  5. Step 5: Solve for x
    x = 14,823,908,173.14/127,531.15
  6. Step 6: Final answer
    x = 116,237.55

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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.