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Finding the Fourth Proportional to 66,535.40, 99,803.10 and 40,291.40

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Solution

The fourth proportional to 66,535.40, 99,803.10 and 40,291.40 is: 60,437.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,535.40 : 99,803.10 = 40,291.40 : x
  2. Step 2: Convert to fraction form
    66,535.40/99,803.10 = 40,291.40/x
  3. Step 3: Cross multiply
    66,535.40x = 99,803.10 × 40,291.40
  4. Step 4: Simplify right side
    66,535.40x = 4,021,206,623.34
  5. Step 5: Solve for x
    x = 4,021,206,623.34/66,535.40
  6. Step 6: Final answer
    x = 60,437.10

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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.