Home / 85,442.48-128,165.81-26,278.59

Finding the Fourth Proportional to 85,442.48, 128,165.81 and 26,278.59

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Solution

The fourth proportional to 85,442.48, 128,165.81 and 26,278.59 is: 39,418.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,442.48 : 128,165.81 = 26,278.59 : x
  2. Step 2: Convert to fraction form
    85,442.48/128,165.81 = 26,278.59/x
  3. Step 3: Cross multiply
    85,442.48x = 128,165.81 × 26,278.59
  4. Step 4: Simplify right side
    85,442.48x = 3,368,016,641.61
  5. Step 5: Solve for x
    x = 3,368,016,641.61/85,442.48
  6. Step 6: Final answer
    x = 39,418.53

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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.