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Finding the Fourth Proportional to 85,444.68, 128,188.90 and 26,280.86

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Solution

The fourth proportional to 85,444.68, 128,188.90 and 26,280.86 is: 39,428.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,444.68 : 128,188.90 = 26,280.86 : x
  2. Step 2: Convert to fraction form
    85,444.68/128,188.90 = 26,280.86/x
  3. Step 3: Cross multiply
    85,444.68x = 128,188.90 × 26,280.86
  4. Step 4: Simplify right side
    85,444.68x = 3,368,914,534.45
  5. Step 5: Solve for x
    x = 3,368,914,534.45/85,444.68
  6. Step 6: Final answer
    x = 39,428.02

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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.