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Finding the Fourth Proportional to 191,846.40, 288,115.20 and 139,315.20

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Solution

The fourth proportional to 191,846.40, 288,115.20 and 139,315.20 is: 209,223.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,846.40 : 288,115.20 = 139,315.20 : x
  2. Step 2: Convert to fraction form
    191,846.40/288,115.20 = 139,315.20/x
  3. Step 3: Cross multiply
    191,846.40x = 288,115.20 × 139,315.20
  4. Step 4: Simplify right side
    191,846.40x = 40,138,826,711.04
  5. Step 5: Solve for x
    x = 40,138,826,711.04/191,846.40
  6. Step 6: Final answer
    x = 209,223.77

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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.