Home / 143,401.65-197,899.10-78,875.87

Finding the Fourth Proportional to 143,401.65, 197,899.10 and 78,875.87

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Solution

The fourth proportional to 143,401.65, 197,899.10 and 78,875.87 is: 108,851.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,401.65 : 197,899.10 = 78,875.87 : x
  2. Step 2: Convert to fraction form
    143,401.65/197,899.10 = 78,875.87/x
  3. Step 3: Cross multiply
    143,401.65x = 197,899.10 × 78,875.87
  4. Step 4: Simplify right side
    143,401.65x = 15,609,462,596.63
  5. Step 5: Solve for x
    x = 15,609,462,596.63/143,401.65
  6. Step 6: Final answer
    x = 108,851.35

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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.