Home / 138,152.10-190,632.85-87,145.57

Finding the Fourth Proportional to 138,152.10, 190,632.85 and 87,145.57

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Solution

The fourth proportional to 138,152.10, 190,632.85 and 87,145.57 is: 120,250.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,152.10 : 190,632.85 = 87,145.57 : x
  2. Step 2: Convert to fraction form
    138,152.10/190,632.85 = 87,145.57/x
  3. Step 3: Cross multiply
    138,152.10x = 190,632.85 × 87,145.57
  4. Step 4: Simplify right side
    138,152.10x = 16,612,808,373.97
  5. Step 5: Solve for x
    x = 16,612,808,373.97/138,152.10
  6. Step 6: Final answer
    x = 120,250.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.