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Finding the Fourth Proportional to 98,751.76, 136,272.20 and 54,031.12

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Solution

The fourth proportional to 98,751.76, 136,272.20 and 54,031.12 is: 74,560.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,751.76 : 136,272.20 = 54,031.12 : x
  2. Step 2: Convert to fraction form
    98,751.76/136,272.20 = 54,031.12/x
  3. Step 3: Cross multiply
    98,751.76x = 136,272.20 × 54,031.12
  4. Step 4: Simplify right side
    98,751.76x = 7,362,939,590.86
  5. Step 5: Solve for x
    x = 7,362,939,590.86/98,751.76
  6. Step 6: Final answer
    x = 74,560.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.