Home / 78,424.45-108,222.78-42,613.70

Finding the Fourth Proportional to 78,424.45, 108,222.78 and 42,613.70

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Solution

The fourth proportional to 78,424.45, 108,222.78 and 42,613.70 is: 58,805.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,424.45 : 108,222.78 = 42,613.70 : x
  2. Step 2: Convert to fraction form
    78,424.45/108,222.78 = 42,613.70/x
  3. Step 3: Cross multiply
    78,424.45x = 108,222.78 × 42,613.70
  4. Step 4: Simplify right side
    78,424.45x = 4,611,772,698.77
  5. Step 5: Solve for x
    x = 4,611,772,698.77/78,424.45
  6. Step 6: Final answer
    x = 58,805.29

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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.