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Finding the Fourth Proportional to 84,800.80, 127,201.20 and 42,810.40

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Solution

The fourth proportional to 84,800.80, 127,201.20 and 42,810.40 is: 64,215.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,800.80 : 127,201.20 = 42,810.40 : x
  2. Step 2: Convert to fraction form
    84,800.80/127,201.20 = 42,810.40/x
  3. Step 3: Cross multiply
    84,800.80x = 127,201.20 × 42,810.40
  4. Step 4: Simplify right side
    84,800.80x = 5,445,534,252.48
  5. Step 5: Solve for x
    x = 5,445,534,252.48/84,800.80
  6. Step 6: Final answer
    x = 64,215.60

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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.