Home / 128,150.40-192,228.65-39,404.72

Finding the Fourth Proportional to 128,150.40, 192,228.65 and 39,404.72

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Solution

The fourth proportional to 128,150.40, 192,228.65 and 39,404.72 is: 59,108.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,150.40 : 192,228.65 = 39,404.72 : x
  2. Step 2: Convert to fraction form
    128,150.40/192,228.65 = 39,404.72/x
  3. Step 3: Cross multiply
    128,150.40x = 192,228.65 × 39,404.72
  4. Step 4: Simplify right side
    128,150.40x = 7,574,714,971.06
  5. Step 5: Solve for x
    x = 7,574,714,971.06/128,150.40
  6. Step 6: Final answer
    x = 59,108.01

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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.