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Finding the Fourth Proportional to 131,647.80, 197,423.10 and 42,904.20

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Solution

The fourth proportional to 131,647.80, 197,423.10 and 42,904.20 is: 64,340.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,647.80 : 197,423.10 = 42,904.20 : x
  2. Step 2: Convert to fraction form
    131,647.80/197,423.10 = 42,904.20/x
  3. Step 3: Cross multiply
    131,647.80x = 197,423.10 × 42,904.20
  4. Step 4: Simplify right side
    131,647.80x = 8,470,280,167.02
  5. Step 5: Solve for x
    x = 8,470,280,167.02/131,647.80
  6. Step 6: Final answer
    x = 64,340.46

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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.