Home / 518,823.56-778,176.98-139,772.30

Finding the Fourth Proportional to 518,823.56, 778,176.98 and 139,772.30

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Solution

The fourth proportional to 518,823.56, 778,176.98 and 139,772.30 is: 209,642.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,823.56 : 778,176.98 = 139,772.30 : x
  2. Step 2: Convert to fraction form
    518,823.56/778,176.98 = 139,772.30/x
  3. Step 3: Cross multiply
    518,823.56x = 778,176.98 × 139,772.30
  4. Step 4: Simplify right side
    518,823.56x = 108,767,582,760.20
  5. Step 5: Solve for x
    x = 108,767,582,760.20/518,823.56
  6. Step 6: Final answer
    x = 209,642.72

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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.