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Finding the Fourth Proportional to 67,879.40, 93,676.76 and 42,400.84

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Solution

The fourth proportional to 67,879.40, 93,676.76 and 42,400.84 is: 58,515.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,879.40 : 93,676.76 = 42,400.84 : x
  2. Step 2: Convert to fraction form
    67,879.40/93,676.76 = 42,400.84/x
  3. Step 3: Cross multiply
    67,879.40x = 93,676.76 × 42,400.84
  4. Step 4: Simplify right side
    67,879.40x = 3,971,973,312.48
  5. Step 5: Solve for x
    x = 3,971,973,312.48/67,879.40
  6. Step 6: Final answer
    x = 58,515.15

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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.