Home / 128,216.60-192,345.80-39,470.12

Finding the Fourth Proportional to 128,216.60, 192,345.80 and 39,470.12

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Solution

The fourth proportional to 128,216.60, 192,345.80 and 39,470.12 is: 59,211.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,216.60 : 192,345.80 = 39,470.12 : x
  2. Step 2: Convert to fraction form
    128,216.60/192,345.80 = 39,470.12/x
  3. Step 3: Cross multiply
    128,216.60x = 192,345.80 × 39,470.12
  4. Step 4: Simplify right side
    128,216.60x = 7,591,911,807.50
  5. Step 5: Solve for x
    x = 7,591,911,807.50/128,216.60
  6. Step 6: Final answer
    x = 59,211.61

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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.