Home / 78,325.79-117,488.68-28,394.55

Finding the Fourth Proportional to 78,325.79, 117,488.68 and 28,394.55

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Solution

The fourth proportional to 78,325.79, 117,488.68 and 28,394.55 is: 42,591.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,325.79 : 117,488.68 = 28,394.55 : x
  2. Step 2: Convert to fraction form
    78,325.79/117,488.68 = 28,394.55/x
  3. Step 3: Cross multiply
    78,325.79x = 117,488.68 × 28,394.55
  4. Step 4: Simplify right side
    78,325.79x = 3,336,038,127.71
  5. Step 5: Solve for x
    x = 3,336,038,127.71/78,325.79
  6. Step 6: Final answer
    x = 42,591.83

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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.