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Finding the Fourth Proportional to 85,320.60, 127,980.90 and 54,293.40

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Solution

The fourth proportional to 85,320.60, 127,980.90 and 54,293.40 is: 81,440.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,320.60 : 127,980.90 = 54,293.40 : x
  2. Step 2: Convert to fraction form
    85,320.60/127,980.90 = 54,293.40/x
  3. Step 3: Cross multiply
    85,320.60x = 127,980.90 × 54,293.40
  4. Step 4: Simplify right side
    85,320.60x = 6,948,518,196.06
  5. Step 5: Solve for x
    x = 6,948,518,196.06/85,320.60
  6. Step 6: Final answer
    x = 81,440.10

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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.