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Finding the Fourth Proportional to 207,125.40, 310,688.10 and 66,898.20

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Solution

The fourth proportional to 207,125.40, 310,688.10 and 66,898.20 is: 100,347.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,125.40 : 310,688.10 = 66,898.20 : x
  2. Step 2: Convert to fraction form
    207,125.40/310,688.10 = 66,898.20/x
  3. Step 3: Cross multiply
    207,125.40x = 310,688.10 × 66,898.20
  4. Step 4: Simplify right side
    207,125.40x = 20,784,474,651.42
  5. Step 5: Solve for x
    x = 20,784,474,651.42/207,125.40
  6. Step 6: Final answer
    x = 100,347.30

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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.