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Finding the Fourth Proportional to 130,010.40, 194,869.80 and 66,806.10

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Solution

The fourth proportional to 130,010.40, 194,869.80 and 66,806.10 is: 100,134.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,010.40 : 194,869.80 = 66,806.10 : x
  2. Step 2: Convert to fraction form
    130,010.40/194,869.80 = 66,806.10/x
  3. Step 3: Cross multiply
    130,010.40x = 194,869.80 × 66,806.10
  4. Step 4: Simplify right side
    130,010.40x = 13,018,491,345.78
  5. Step 5: Solve for x
    x = 13,018,491,345.78/130,010.40
  6. Step 6: Final answer
    x = 100,134.23

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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.