Home / 121,159.40-181,739.10-76,836.20

Finding the Fourth Proportional to 121,159.40, 181,739.10 and 76,836.20

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Solution

The fourth proportional to 121,159.40, 181,739.10 and 76,836.20 is: 115,254.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,159.40 : 181,739.10 = 76,836.20 : x
  2. Step 2: Convert to fraction form
    121,159.40/181,739.10 = 76,836.20/x
  3. Step 3: Cross multiply
    121,159.40x = 181,739.10 × 76,836.20
  4. Step 4: Simplify right side
    121,159.40x = 13,964,141,835.42
  5. Step 5: Solve for x
    x = 13,964,141,835.42/121,159.40
  6. Step 6: Final answer
    x = 115,254.30

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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.