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Finding the Fourth Proportional to 147,140.64, 220,764.24 and 90,915.12

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Solution

The fourth proportional to 147,140.64, 220,764.24 and 90,915.12 is: 136,405.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,140.64 : 220,764.24 = 90,915.12 : x
  2. Step 2: Convert to fraction form
    147,140.64/220,764.24 = 90,915.12/x
  3. Step 3: Cross multiply
    147,140.64x = 220,764.24 × 90,915.12
  4. Step 4: Simplify right side
    147,140.64x = 20,070,807,371.31
  5. Step 5: Solve for x
    x = 20,070,807,371.31/147,140.64
  6. Step 6: Final answer
    x = 136,405.60

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1.5x scale

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.