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Finding the Fourth Proportional to 84,896.80, 127,345.20 and 42,906.40

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Solution

The fourth proportional to 84,896.80, 127,345.20 and 42,906.40 is: 64,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,896.80 : 127,345.20 = 42,906.40 : x
  2. Step 2: Convert to fraction form
    84,896.80/127,345.20 = 42,906.40/x
  3. Step 3: Cross multiply
    84,896.80x = 127,345.20 × 42,906.40
  4. Step 4: Simplify right side
    84,896.80x = 5,463,924,089.28
  5. Step 5: Solve for x
    x = 5,463,924,089.28/84,896.80
  6. Step 6: Final answer
    x = 64,359.60

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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.