Home / 78,286.45-108,035.15-42,476.45

Finding the Fourth Proportional to 78,286.45, 108,035.15 and 42,476.45

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Solution

The fourth proportional to 78,286.45, 108,035.15 and 42,476.45 is: 58,617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,286.45 : 108,035.15 = 42,476.45 : x
  2. Step 2: Convert to fraction form
    78,286.45/108,035.15 = 42,476.45/x
  3. Step 3: Cross multiply
    78,286.45x = 108,035.15 × 42,476.45
  4. Step 4: Simplify right side
    78,286.45x = 4,588,949,741.29
  5. Step 5: Solve for x
    x = 4,588,949,741.29/78,286.45
  6. Step 6: Final answer
    x = 58,617.42

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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.