Home / 91,835.60-137,738.28-85,858.16

Finding the Fourth Proportional to 91,835.60, 137,738.28 and 85,858.16

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Solution

The fourth proportional to 91,835.60, 137,738.28 and 85,858.16 is: 128,773.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,835.60 : 137,738.28 = 85,858.16 : x
  2. Step 2: Convert to fraction form
    91,835.60/137,738.28 = 85,858.16/x
  3. Step 3: Cross multiply
    91,835.60x = 137,738.28 × 85,858.16
  4. Step 4: Simplify right side
    91,835.60x = 11,825,955,282.36
  5. Step 5: Solve for x
    x = 11,825,955,282.36/91,835.60
  6. Step 6: Final answer
    x = 128,773.10

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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.