Home / 103,534.70-155,302.05-66,209.90

Finding the Fourth Proportional to 103,534.70, 155,302.05 and 66,209.90

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Solution

The fourth proportional to 103,534.70, 155,302.05 and 66,209.90 is: 99,314.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,534.70 : 155,302.05 = 66,209.90 : x
  2. Step 2: Convert to fraction form
    103,534.70/155,302.05 = 66,209.90/x
  3. Step 3: Cross multiply
    103,534.70x = 155,302.05 × 66,209.90
  4. Step 4: Simplify right side
    103,534.70x = 10,282,533,200.30
  5. Step 5: Solve for x
    x = 10,282,533,200.30/103,534.70
  6. Step 6: Final answer
    x = 99,314.85

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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.