Home / 78,501.45-108,330.99-42,690.70

Finding the Fourth Proportional to 78,501.45, 108,330.99 and 42,690.70

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Solution

The fourth proportional to 78,501.45, 108,330.99 and 42,690.70 is: 58,912.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,501.45 : 108,330.99 = 42,690.70 : x
  2. Step 2: Convert to fraction form
    78,501.45/108,330.99 = 42,690.70/x
  3. Step 3: Cross multiply
    78,501.45x = 108,330.99 × 42,690.70
  4. Step 4: Simplify right side
    78,501.45x = 4,624,725,770.12
  5. Step 5: Solve for x
    x = 4,624,725,770.12/78,501.45
  6. Step 6: Final answer
    x = 58,912.61

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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.