Home / 121,289.28-181,959.84-42,406.08

Finding the Fourth Proportional to 121,289.28, 181,959.84 and 42,406.08

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Solution

The fourth proportional to 121,289.28, 181,959.84 and 42,406.08 is: 63,618.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,289.28 : 181,959.84 = 42,406.08 : x
  2. Step 2: Convert to fraction form
    121,289.28/181,959.84 = 42,406.08/x
  3. Step 3: Cross multiply
    121,289.28x = 181,959.84 × 42,406.08
  4. Step 4: Simplify right side
    121,289.28x = 7,716,203,531.83
  5. Step 5: Solve for x
    x = 7,716,203,531.83/121,289.28
  6. Step 6: Final answer
    x = 63,618.18

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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.