Home / 128,837.32-192,887.34-87,209.80

Finding the Fourth Proportional to 128,837.32, 192,887.34 and 87,209.80

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Solution

The fourth proportional to 128,837.32, 192,887.34 and 87,209.80 is: 130,565.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,837.32 : 192,887.34 = 87,209.80 : x
  2. Step 2: Convert to fraction form
    128,837.32/192,887.34 = 87,209.80/x
  3. Step 3: Cross multiply
    128,837.32x = 192,887.34 × 87,209.80
  4. Step 4: Simplify right side
    128,837.32x = 16,821,666,343.93
  5. Step 5: Solve for x
    x = 16,821,666,343.93/128,837.32
  6. Step 6: Final answer
    x = 130,565.17

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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.