Home / 85,428.10-128,144.18-26,264.31

Finding the Fourth Proportional to 85,428.10, 128,144.18 and 26,264.31

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Solution

The fourth proportional to 85,428.10, 128,144.18 and 26,264.31 is: 39,397.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,428.10 : 128,144.18 = 26,264.31 : x
  2. Step 2: Convert to fraction form
    85,428.10/128,144.18 = 26,264.31/x
  3. Step 3: Cross multiply
    85,428.10x = 128,144.18 × 26,264.31
  4. Step 4: Simplify right side
    85,428.10x = 3,365,618,468.22
  5. Step 5: Solve for x
    x = 3,365,618,468.22/85,428.10
  6. Step 6: Final answer
    x = 39,397.09

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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.