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Finding the Fourth Proportional to 229,157.50, 316,239.51 and 128,557.66

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Solution

The fourth proportional to 229,157.50, 316,239.51 and 128,557.66 is: 177,410.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,157.50 : 316,239.51 = 128,557.66 : x
  2. Step 2: Convert to fraction form
    229,157.50/316,239.51 = 128,557.66/x
  3. Step 3: Cross multiply
    229,157.50x = 316,239.51 × 128,557.66
  4. Step 4: Simplify right side
    229,157.50x = 40,655,011,405.15
  5. Step 5: Solve for x
    x = 40,655,011,405.15/229,157.50
  6. Step 6: Final answer
    x = 177,410.78

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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.