Home / 121,287.20-181,930.80-91,762.70

Finding the Fourth Proportional to 121,287.20, 181,930.80 and 91,762.70

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Solution

The fourth proportional to 121,287.20, 181,930.80 and 91,762.70 is: 137,644.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,287.20 : 181,930.80 = 91,762.70 : x
  2. Step 2: Convert to fraction form
    121,287.20/181,930.80 = 91,762.70/x
  3. Step 3: Cross multiply
    121,287.20x = 181,930.80 × 91,762.70
  4. Step 4: Simplify right side
    121,287.20x = 16,694,461,421.16
  5. Step 5: Solve for x
    x = 16,694,461,421.16/121,287.20
  6. Step 6: Final answer
    x = 137,644.05

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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.