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Finding the Fourth Proportional to 134,458.10, 201,687.15 and 87,218.90

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Solution

The fourth proportional to 134,458.10, 201,687.15 and 87,218.90 is: 130,828.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,458.10 : 201,687.15 = 87,218.90 : x
  2. Step 2: Convert to fraction form
    134,458.10/201,687.15 = 87,218.90/x
  3. Step 3: Cross multiply
    134,458.10x = 201,687.15 × 87,218.90
  4. Step 4: Simplify right side
    134,458.10x = 17,590,931,367.14
  5. Step 5: Solve for x
    x = 17,590,931,367.14/134,458.10
  6. Step 6: Final answer
    x = 130,828.35

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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.