Home / 78,199.61-117,299.43-28,278.59

Finding the Fourth Proportional to 78,199.61, 117,299.43 and 28,278.59

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Solution

The fourth proportional to 78,199.61, 117,299.43 and 28,278.59 is: 42,417.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,199.61 : 117,299.43 = 28,278.59 : x
  2. Step 2: Convert to fraction form
    78,199.61/117,299.43 = 28,278.59/x
  3. Step 3: Cross multiply
    78,199.61x = 117,299.43 × 28,278.59
  4. Step 4: Simplify right side
    78,199.61x = 3,317,061,901.71
  5. Step 5: Solve for x
    x = 3,317,061,901.71/78,199.61
  6. Step 6: Final answer
    x = 42,417.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.