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Finding the Fourth Proportional to 103,687.76, 143,089.32 and 58,975.76

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Solution

The fourth proportional to 103,687.76, 143,089.32 and 58,975.76 is: 81,386.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,687.76 : 143,089.32 = 58,975.76 : x
  2. Step 2: Convert to fraction form
    103,687.76/143,089.32 = 58,975.76/x
  3. Step 3: Cross multiply
    103,687.76x = 143,089.32 × 58,975.76
  4. Step 4: Simplify right side
    103,687.76x = 8,438,801,394.88
  5. Step 5: Solve for x
    x = 8,438,801,394.88/103,687.76
  6. Step 6: Final answer
    x = 81,386.67

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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.