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Finding the Fourth Proportional to 208,025.70, 312,038.55 and 83,456.10

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Solution

The fourth proportional to 208,025.70, 312,038.55 and 83,456.10 is: 125,184.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,025.70 : 312,038.55 = 83,456.10 : x
  2. Step 2: Convert to fraction form
    208,025.70/312,038.55 = 83,456.10/x
  3. Step 3: Cross multiply
    208,025.70x = 312,038.55 × 83,456.10
  4. Step 4: Simplify right side
    208,025.70x = 26,041,520,432.66
  5. Step 5: Solve for x
    x = 26,041,520,432.66/208,025.70
  6. Step 6: Final answer
    x = 125,184.15

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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.