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Finding the Fourth Proportional to 134,539.20, 201,808.80 and 87,230.40

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Solution

The fourth proportional to 134,539.20, 201,808.80 and 87,230.40 is: 130,845.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,539.20 : 201,808.80 = 87,230.40 : x
  2. Step 2: Convert to fraction form
    134,539.20/201,808.80 = 87,230.40/x
  3. Step 3: Cross multiply
    134,539.20x = 201,808.80 × 87,230.40
  4. Step 4: Simplify right side
    134,539.20x = 17,603,862,347.52
  5. Step 5: Solve for x
    x = 17,603,862,347.52/134,539.20
  6. Step 6: Final answer
    x = 130,845.60

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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.