Home / 121,520.40-182,280.60-77,197.20

Finding the Fourth Proportional to 121,520.40, 182,280.60 and 77,197.20

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Solution

The fourth proportional to 121,520.40, 182,280.60 and 77,197.20 is: 115,795.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,520.40 : 182,280.60 = 77,197.20 : x
  2. Step 2: Convert to fraction form
    121,520.40/182,280.60 = 77,197.20/x
  3. Step 3: Cross multiply
    121,520.40x = 182,280.60 × 77,197.20
  4. Step 4: Simplify right side
    121,520.40x = 14,071,551,934.32
  5. Step 5: Solve for x
    x = 14,071,551,934.32/121,520.40
  6. Step 6: Final answer
    x = 115,795.80

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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.