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Finding the Fourth Proportional to 85,307.30, 127,730.55 and 66,875.30

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Solution

The fourth proportional to 85,307.30, 127,730.55 and 66,875.30 is: 100,132.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,307.30 : 127,730.55 = 66,875.30 : x
  2. Step 2: Convert to fraction form
    85,307.30/127,730.55 = 66,875.30/x
  3. Step 3: Cross multiply
    85,307.30x = 127,730.55 × 66,875.30
  4. Step 4: Simplify right side
    85,307.30x = 8,542,018,850.42
  5. Step 5: Solve for x
    x = 8,542,018,850.42/85,307.30
  6. Step 6: Final answer
    x = 100,132.33

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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.