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Finding the Fourth Proportional to 84,807.20, 117,070.80 and 55,008.80

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Solution

The fourth proportional to 84,807.20, 117,070.80 and 55,008.80 is: 75,936.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,807.20 : 117,070.80 = 55,008.80 : x
  2. Step 2: Convert to fraction form
    84,807.20/117,070.80 = 55,008.80/x
  3. Step 3: Cross multiply
    84,807.20x = 117,070.80 × 55,008.80
  4. Step 4: Simplify right side
    84,807.20x = 6,439,924,223.04
  5. Step 5: Solve for x
    x = 6,439,924,223.04/84,807.20
  6. Step 6: Final answer
    x = 75,936.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.