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Finding the Fourth Proportional to 98,969.40, 136,575.18 and 53,645.40

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Solution

The fourth proportional to 98,969.40, 136,575.18 and 53,645.40 is: 74,029.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,969.40 : 136,575.18 = 53,645.40 : x
  2. Step 2: Convert to fraction form
    98,969.40/136,575.18 = 53,645.40/x
  3. Step 3: Cross multiply
    98,969.40x = 136,575.18 × 53,645.40
  4. Step 4: Simplify right side
    98,969.40x = 7,326,630,161.17
  5. Step 5: Solve for x
    x = 7,326,630,161.17/98,969.40
  6. Step 6: Final answer
    x = 74,029.25

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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.