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Finding the Fourth Proportional to 144,851.60, 217,277.40 and 85,656.80

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Solution

The fourth proportional to 144,851.60, 217,277.40 and 85,656.80 is: 128,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,851.60 : 217,277.40 = 85,656.80 : x
  2. Step 2: Convert to fraction form
    144,851.60/217,277.40 = 85,656.80/x
  3. Step 3: Cross multiply
    144,851.60x = 217,277.40 × 85,656.80
  4. Step 4: Simplify right side
    144,851.60x = 18,611,286,796.32
  5. Step 5: Solve for x
    x = 18,611,286,796.32/144,851.60
  6. Step 6: Final answer
    x = 128,485.20

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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.