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Finding the Fourth Proportional to 342,073.60, 513,110.40 and 120,428.80

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Solution

The fourth proportional to 342,073.60, 513,110.40 and 120,428.80 is: 180,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,073.60 : 513,110.40 = 120,428.80 : x
  2. Step 2: Convert to fraction form
    342,073.60/513,110.40 = 120,428.80/x
  3. Step 3: Cross multiply
    342,073.60x = 513,110.40 × 120,428.80
  4. Step 4: Simplify right side
    342,073.60x = 61,793,269,739.52
  5. Step 5: Solve for x
    x = 61,793,269,739.52/342,073.60
  6. Step 6: Final answer
    x = 180,643.20

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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.