Home / 85,490.28-128,239.02-23,160.72

Finding the Fourth Proportional to 85,490.28, 128,239.02 and 23,160.72

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Solution

The fourth proportional to 85,490.28, 128,239.02 and 23,160.72 is: 34,742.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,490.28 : 128,239.02 = 23,160.72 : x
  2. Step 2: Convert to fraction form
    85,490.28/128,239.02 = 23,160.72/x
  3. Step 3: Cross multiply
    85,490.28x = 128,239.02 × 23,160.72
  4. Step 4: Simplify right side
    85,490.28x = 2,970,108,035.29
  5. Step 5: Solve for x
    x = 2,970,108,035.29/85,490.28
  6. Step 6: Final answer
    x = 34,742.06

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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.