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Finding the Fourth Proportional to 143,075.80, 197,462.10 and 79,434.10

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Solution

The fourth proportional to 143,075.80, 197,462.10 and 79,434.10 is: 109,628.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,075.80 : 197,462.10 = 79,434.10 : x
  2. Step 2: Convert to fraction form
    143,075.80/197,462.10 = 79,434.10/x
  3. Step 3: Cross multiply
    143,075.80x = 197,462.10 × 79,434.10
  4. Step 4: Simplify right side
    143,075.80x = 15,685,224,197.61
  5. Step 5: Solve for x
    x = 15,685,224,197.61/143,075.80
  6. Step 6: Final answer
    x = 109,628.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.