Home / 272,378.02-408,632.64-85,389.52

Finding the Fourth Proportional to 272,378.02, 408,632.64 and 85,389.52

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Solution

The fourth proportional to 272,378.02, 408,632.64 and 85,389.52 is: 128,104.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,378.02 : 408,632.64 = 85,389.52 : x
  2. Step 2: Convert to fraction form
    272,378.02/408,632.64 = 85,389.52/x
  3. Step 3: Cross multiply
    272,378.02x = 408,632.64 × 85,389.52
  4. Step 4: Simplify right side
    272,378.02x = 34,892,944,985.93
  5. Step 5: Solve for x
    x = 34,892,944,985.93/272,378.02
  6. Step 6: Final answer
    x = 128,104.85

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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.