Home / 91,588.95-137,219.40-81,091.35

Finding the Fourth Proportional to 91,588.95, 137,219.40 and 81,091.35

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Solution

The fourth proportional to 91,588.95, 137,219.40 and 81,091.35 is: 121,491.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,588.95 : 137,219.40 = 81,091.35 : x
  2. Step 2: Convert to fraction form
    91,588.95/137,219.40 = 81,091.35/x
  3. Step 3: Cross multiply
    91,588.95x = 137,219.40 × 81,091.35
  4. Step 4: Simplify right side
    91,588.95x = 11,127,306,392.19
  5. Step 5: Solve for x
    x = 11,127,306,392.19/91,588.95
  6. Step 6: Final answer
    x = 121,491.80

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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.