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Finding the Fourth Proportional to 207,765.12, 286,904.70 and 156,690.36

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Solution

The fourth proportional to 207,765.12, 286,904.70 and 156,690.36 is: 216,375.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,765.12 : 286,904.70 = 156,690.36 : x
  2. Step 2: Convert to fraction form
    207,765.12/286,904.70 = 156,690.36/x
  3. Step 3: Cross multiply
    207,765.12x = 286,904.70 × 156,690.36
  4. Step 4: Simplify right side
    207,765.12x = 44,955,200,728.69
  5. Step 5: Solve for x
    x = 44,955,200,728.69/207,765.12
  6. Step 6: Final answer
    x = 216,375.11

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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.