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Finding the Fourth Proportional to 147,128, 220,692.56 and 36,320

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Solution

The fourth proportional to 147,128, 220,692.56 and 36,320 is: 54,480.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,128 : 220,692.56 = 36,320 : x
  2. Step 2: Convert to fraction form
    147,128/220,692.56 = 36,320/x
  3. Step 3: Cross multiply
    147,128x = 220,692.56 × 36,320
  4. Step 4: Simplify right side
    147,128x = 8,015,553,779.20
  5. Step 5: Solve for x
    x = 8,015,553,779.20/147,128
  6. Step 6: Final answer
    x = 54,480.14

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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.