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Finding the Fourth Proportional to 519,870.80, 779,806.20 and 125,886.80

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Solution

The fourth proportional to 519,870.80, 779,806.20 and 125,886.80 is: 188,830.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,870.80 : 779,806.20 = 125,886.80 : x
  2. Step 2: Convert to fraction form
    519,870.80/779,806.20 = 125,886.80/x
  3. Step 3: Cross multiply
    519,870.80x = 779,806.20 × 125,886.80
  4. Step 4: Simplify right side
    519,870.80x = 98,167,307,138.16
  5. Step 5: Solve for x
    x = 98,167,307,138.16/519,870.80
  6. Step 6: Final answer
    x = 188,830.20

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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.