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Finding the Fourth Proportional to 98,686.64, 136,189.56 and 53,977.52

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Solution

The fourth proportional to 98,686.64, 136,189.56 and 53,977.52 is: 74,490.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,686.64 : 136,189.56 = 53,977.52 : x
  2. Step 2: Convert to fraction form
    98,686.64/136,189.56 = 53,977.52/x
  3. Step 3: Cross multiply
    98,686.64x = 136,189.56 × 53,977.52
  4. Step 4: Simplify right side
    98,686.64x = 7,351,174,698.69
  5. Step 5: Solve for x
    x = 7,351,174,698.69/98,686.64
  6. Step 6: Final answer
    x = 74,490.07

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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.