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Finding the Fourth Proportional to 212,565.64, 318,870.06 and 72,334.12

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Solution

The fourth proportional to 212,565.64, 318,870.06 and 72,334.12 is: 108,508.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,565.64 : 318,870.06 = 72,334.12 : x
  2. Step 2: Convert to fraction form
    212,565.64/318,870.06 = 72,334.12/x
  3. Step 3: Cross multiply
    212,565.64x = 318,870.06 × 72,334.12
  4. Step 4: Simplify right side
    212,565.64x = 23,065,185,184.45
  5. Step 5: Solve for x
    x = 23,065,185,184.45/212,565.64
  6. Step 6: Final answer
    x = 108,508.53

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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.