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Finding the Fourth Proportional to 91,925.60, 137,619.60 and 68,655.20

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Solution

The fourth proportional to 91,925.60, 137,619.60 and 68,655.20 is: 102,782.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,925.60 : 137,619.60 = 68,655.20 : x
  2. Step 2: Convert to fraction form
    91,925.60/137,619.60 = 68,655.20/x
  3. Step 3: Cross multiply
    91,925.60x = 137,619.60 × 68,655.20
  4. Step 4: Simplify right side
    91,925.60x = 9,448,301,161.92
  5. Step 5: Solve for x
    x = 9,448,301,161.92/91,925.60
  6. Step 6: Final answer
    x = 102,782.05

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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.