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Finding the Fourth Proportional to 98,518.52, 135,779.78 and 74,587.88

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Solution

The fourth proportional to 98,518.52, 135,779.78 and 74,587.88 is: 102,798.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,518.52 : 135,779.78 = 74,587.88 : x
  2. Step 2: Convert to fraction form
    98,518.52/135,779.78 = 74,587.88/x
  3. Step 3: Cross multiply
    98,518.52x = 135,779.78 × 74,587.88
  4. Step 4: Simplify right side
    98,518.52x = 10,127,525,937.07
  5. Step 5: Solve for x
    x = 10,127,525,937.07/98,518.52
  6. Step 6: Final answer
    x = 102,798.19

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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.