Home / 128,438.20-192,587.28-39,675.16

Finding the Fourth Proportional to 128,438.20, 192,587.28 and 39,675.16

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Solution

The fourth proportional to 128,438.20, 192,587.28 and 39,675.16 is: 59,491.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,438.20 : 192,587.28 = 39,675.16 : x
  2. Step 2: Convert to fraction form
    128,438.20/192,587.28 = 39,675.16/x
  3. Step 3: Cross multiply
    128,438.20x = 192,587.28 × 39,675.16
  4. Step 4: Simplify right side
    128,438.20x = 7,640,931,147.96
  5. Step 5: Solve for x
    x = 7,640,931,147.96/128,438.20
  6. Step 6: Final answer
    x = 59,491.11

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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.