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Finding the Fourth Proportional to 88,986.30, 133,479.45 and 85,875.90

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Solution

The fourth proportional to 88,986.30, 133,479.45 and 85,875.90 is: 128,813.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,986.30 : 133,479.45 = 85,875.90 : x
  2. Step 2: Convert to fraction form
    88,986.30/133,479.45 = 85,875.90/x
  3. Step 3: Cross multiply
    88,986.30x = 133,479.45 × 85,875.90
  4. Step 4: Simplify right side
    88,986.30x = 11,462,667,900.26
  5. Step 5: Solve for x
    x = 11,462,667,900.26/88,986.30
  6. Step 6: Final answer
    x = 128,813.85

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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.