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Finding the Fourth Proportional to 121,101.32, 181,653 and 42,215.40

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Solution

The fourth proportional to 121,101.32, 181,653 and 42,215.40 is: 63,323.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,101.32 : 181,653 = 42,215.40 : x
  2. Step 2: Convert to fraction form
    121,101.32/181,653 = 42,215.40/x
  3. Step 3: Cross multiply
    121,101.32x = 181,653 × 42,215.40
  4. Step 4: Simplify right side
    121,101.32x = 7,668,554,056.20
  5. Step 5: Solve for x
    x = 7,668,554,056.20/121,101.32
  6. Step 6: Final answer
    x = 63,323.46

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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.