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Finding the Fourth Proportional to 78,451.09, 108,263.35 and 42,641.09

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Solution

The fourth proportional to 78,451.09, 108,263.35 and 42,641.09 is: 58,845.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,451.09 : 108,263.35 = 42,641.09 : x
  2. Step 2: Convert to fraction form
    78,451.09/108,263.35 = 42,641.09/x
  3. Step 3: Cross multiply
    78,451.09x = 108,263.35 × 42,641.09
  4. Step 4: Simplify right side
    78,451.09x = 4,616,467,251.05
  5. Step 5: Solve for x
    x = 4,616,467,251.05/78,451.09
  6. Step 6: Final answer
    x = 58,845.16

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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.