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Finding the Fourth Proportional to 99,810.20, 149,715.30 and 91,645.40

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Solution

The fourth proportional to 99,810.20, 149,715.30 and 91,645.40 is: 137,468.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,810.20 : 149,715.30 = 91,645.40 : x
  2. Step 2: Convert to fraction form
    99,810.20/149,715.30 = 91,645.40/x
  3. Step 3: Cross multiply
    99,810.20x = 149,715.30 × 91,645.40
  4. Step 4: Simplify right side
    99,810.20x = 13,720,718,554.62
  5. Step 5: Solve for x
    x = 13,720,718,554.62/99,810.20
  6. Step 6: Final answer
    x = 137,468.10

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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.