Home / 128,078.40-192,152.16-39,330.24

Finding the Fourth Proportional to 128,078.40, 192,152.16 and 39,330.24

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Solution

The fourth proportional to 128,078.40, 192,152.16 and 39,330.24 is: 59,005.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,078.40 : 192,152.16 = 39,330.24 : x
  2. Step 2: Convert to fraction form
    128,078.40/192,152.16 = 39,330.24/x
  3. Step 3: Cross multiply
    128,078.40x = 192,152.16 × 39,330.24
  4. Step 4: Simplify right side
    128,078.40x = 7,557,390,569.32
  5. Step 5: Solve for x
    x = 7,557,390,569.32/128,078.40
  6. Step 6: Final answer
    x = 59,005.97

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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.