Home / 128,301.34-192,431.80-42,911.55

Finding the Fourth Proportional to 128,301.34, 192,431.80 and 42,911.55

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Solution

The fourth proportional to 128,301.34, 192,431.80 and 42,911.55 is: 64,360.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,301.34 : 192,431.80 = 42,911.55 : x
  2. Step 2: Convert to fraction form
    128,301.34/192,431.80 = 42,911.55/x
  3. Step 3: Cross multiply
    128,301.34x = 192,431.80 × 42,911.55
  4. Step 4: Simplify right side
    128,301.34x = 8,257,546,807.29
  5. Step 5: Solve for x
    x = 8,257,546,807.29/128,301.34
  6. Step 6: Final answer
    x = 64,360.57

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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.