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Finding the Fourth Proportional to 100,043.93, 149,899.30 and 70,399.49

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Solution

The fourth proportional to 100,043.93, 149,899.30 and 70,399.49 is: 105,482.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,043.93 : 149,899.30 = 70,399.49 : x
  2. Step 2: Convert to fraction form
    100,043.93/149,899.30 = 70,399.49/x
  3. Step 3: Cross multiply
    100,043.93x = 149,899.30 × 70,399.49
  4. Step 4: Simplify right side
    100,043.93x = 10,552,834,271.36
  5. Step 5: Solve for x
    x = 10,552,834,271.36/100,043.93
  6. Step 6: Final answer
    x = 105,482.00

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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.