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Finding the Fourth Proportional to 85,050.40, 127,575.60 and 21,870.40

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Solution

The fourth proportional to 85,050.40, 127,575.60 and 21,870.40 is: 32,805.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,050.40 : 127,575.60 = 21,870.40 : x
  2. Step 2: Convert to fraction form
    85,050.40/127,575.60 = 21,870.40/x
  3. Step 3: Cross multiply
    85,050.40x = 127,575.60 × 21,870.40
  4. Step 4: Simplify right side
    85,050.40x = 2,790,129,402.24
  5. Step 5: Solve for x
    x = 2,790,129,402.24/85,050.40
  6. Step 6: Final answer
    x = 32,805.60

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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.