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Finding the Fourth Proportional to 203,140.80, 304,711.20 and 84,772.80

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Solution

The fourth proportional to 203,140.80, 304,711.20 and 84,772.80 is: 127,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,140.80 : 304,711.20 = 84,772.80 : x
  2. Step 2: Convert to fraction form
    203,140.80/304,711.20 = 84,772.80/x
  3. Step 3: Cross multiply
    203,140.80x = 304,711.20 × 84,772.80
  4. Step 4: Simplify right side
    203,140.80x = 25,831,221,615.36
  5. Step 5: Solve for x
    x = 25,831,221,615.36/203,140.80
  6. Step 6: Final answer
    x = 127,159.20

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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.