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Finding the Fourth Proportional to 43,309, 64,853.34 and 39,315.16

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Solution

The fourth proportional to 43,309, 64,853.34 and 39,315.16 is: 58,872.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,309 : 64,853.34 = 39,315.16 : x
  2. Step 2: Convert to fraction form
    43,309/64,853.34 = 39,315.16/x
  3. Step 3: Cross multiply
    43,309x = 64,853.34 × 39,315.16
  4. Step 4: Simplify right side
    43,309x = 2,549,719,438.63
  5. Step 5: Solve for x
    x = 2,549,719,438.63/43,309
  6. Step 6: Final answer
    x = 58,872.74

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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.