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Finding the Fourth Proportional to 121,323.20, 181,984.80 and 42,429.20

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Solution

The fourth proportional to 121,323.20, 181,984.80 and 42,429.20 is: 63,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,323.20 : 181,984.80 = 42,429.20 : x
  2. Step 2: Convert to fraction form
    121,323.20/181,984.80 = 42,429.20/x
  3. Step 3: Cross multiply
    121,323.20x = 181,984.80 × 42,429.20
  4. Step 4: Simplify right side
    121,323.20x = 7,721,469,476.16
  5. Step 5: Solve for x
    x = 7,721,469,476.16/121,323.20
  6. Step 6: Final answer
    x = 63,643.80

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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.