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Finding the Fourth Proportional to 78,645.66, 108,527.49 and 42,833.49

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Solution

The fourth proportional to 78,645.66, 108,527.49 and 42,833.49 is: 59,108.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,645.66 : 108,527.49 = 42,833.49 : x
  2. Step 2: Convert to fraction form
    78,645.66/108,527.49 = 42,833.49/x
  3. Step 3: Cross multiply
    78,645.66x = 108,527.49 × 42,833.49
  4. Step 4: Simplify right side
    78,645.66x = 4,648,611,157.64
  5. Step 5: Solve for x
    x = 4,648,611,157.64/78,645.66
  6. Step 6: Final answer
    x = 59,108.30

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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.