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Finding the Fourth Proportional to 85,851.83, 128,777.13 and 26,687.40

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Solution

The fourth proportional to 85,851.83, 128,777.13 and 26,687.40 is: 40,030.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,851.83 : 128,777.13 = 26,687.40 : x
  2. Step 2: Convert to fraction form
    85,851.83/128,777.13 = 26,687.40/x
  3. Step 3: Cross multiply
    85,851.83x = 128,777.13 × 26,687.40
  4. Step 4: Simplify right side
    85,851.83x = 3,436,726,779.16
  5. Step 5: Solve for x
    x = 3,436,726,779.16/85,851.83
  6. Step 6: Final answer
    x = 40,030.91

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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.