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Finding the Fourth Proportional to 103,885.53, 143,438.81 and 63,654.24

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Solution

The fourth proportional to 103,885.53, 143,438.81 and 63,654.24 is: 87,889.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,885.53 : 143,438.81 = 63,654.24 : x
  2. Step 2: Convert to fraction form
    103,885.53/143,438.81 = 63,654.24/x
  3. Step 3: Cross multiply
    103,885.53x = 143,438.81 × 63,654.24
  4. Step 4: Simplify right side
    103,885.53x = 9,130,488,118.78
  5. Step 5: Solve for x
    x = 9,130,488,118.78/103,885.53
  6. Step 6: Final answer
    x = 87,889.89

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1.5x scale

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.