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Finding the Fourth Proportional to 121,174.56, 181,748.88 and 42,290.28

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Solution

The fourth proportional to 121,174.56, 181,748.88 and 42,290.28 is: 63,430.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,174.56 : 181,748.88 = 42,290.28 : x
  2. Step 2: Convert to fraction form
    121,174.56/181,748.88 = 42,290.28/x
  3. Step 3: Cross multiply
    121,174.56x = 181,748.88 × 42,290.28
  4. Step 4: Simplify right side
    121,174.56x = 7,686,211,024.89
  5. Step 5: Solve for x
    x = 7,686,211,024.89/121,174.56
  6. Step 6: Final answer
    x = 63,430.90

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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.