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Finding the Fourth Proportional to 128,595.20, 192,950.40 and 58,438.40

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Solution

The fourth proportional to 128,595.20, 192,950.40 and 58,438.40 is: 87,683.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,595.20 : 192,950.40 = 58,438.40 : x
  2. Step 2: Convert to fraction form
    128,595.20/192,950.40 = 58,438.40/x
  3. Step 3: Cross multiply
    128,595.20x = 192,950.40 × 58,438.40
  4. Step 4: Simplify right side
    128,595.20x = 11,275,712,655.36
  5. Step 5: Solve for x
    x = 11,275,712,655.36/128,595.20
  6. Step 6: Final answer
    x = 87,683.78

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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.