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Finding the Fourth Proportional to 143,899.84, 215,848.41 and 80,719.84

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Solution

The fourth proportional to 143,899.84, 215,848.41 and 80,719.84 is: 121,079.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,899.84 : 215,848.41 = 80,719.84 : x
  2. Step 2: Convert to fraction form
    143,899.84/215,848.41 = 80,719.84/x
  3. Step 3: Cross multiply
    143,899.84x = 215,848.41 × 80,719.84
  4. Step 4: Simplify right side
    143,899.84x = 17,423,249,119.45
  5. Step 5: Solve for x
    x = 17,423,249,119.45/143,899.84
  6. Step 6: Final answer
    x = 121,079.00

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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.