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Finding the Fourth Proportional to 85,432.60, 128,254.20 and 53,842.60

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Solution

The fourth proportional to 85,432.60, 128,254.20 and 53,842.60 is: 80,830.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,432.60 : 128,254.20 = 53,842.60 : x
  2. Step 2: Convert to fraction form
    85,432.60/128,254.20 = 53,842.60/x
  3. Step 3: Cross multiply
    85,432.60x = 128,254.20 × 53,842.60
  4. Step 4: Simplify right side
    85,432.60x = 6,905,539,588.92
  5. Step 5: Solve for x
    x = 6,905,539,588.92/85,432.60
  6. Step 6: Final answer
    x = 80,830.26

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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.