Home / 91,416.20-137,124.30-76,670.60

Finding the Fourth Proportional to 91,416.20, 137,124.30 and 76,670.60

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Solution

The fourth proportional to 91,416.20, 137,124.30 and 76,670.60 is: 115,005.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,416.20 : 137,124.30 = 76,670.60 : x
  2. Step 2: Convert to fraction form
    91,416.20/137,124.30 = 76,670.60/x
  3. Step 3: Cross multiply
    91,416.20x = 137,124.30 × 76,670.60
  4. Step 4: Simplify right side
    91,416.20x = 10,513,402,355.58
  5. Step 5: Solve for x
    x = 10,513,402,355.58/91,416.20
  6. Step 6: Final answer
    x = 115,005.90

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1.5x scale

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.