Home / 103,861.78-143,329.31-56,115.12

Finding the Fourth Proportional to 103,861.78, 143,329.31 and 56,115.12

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Solution

The fourth proportional to 103,861.78, 143,329.31 and 56,115.12 is: 77,438.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,861.78 : 143,329.31 = 56,115.12 : x
  2. Step 2: Convert to fraction form
    103,861.78/143,329.31 = 56,115.12/x
  3. Step 3: Cross multiply
    103,861.78x = 143,329.31 × 56,115.12
  4. Step 4: Simplify right side
    103,861.78x = 8,042,941,430.17
  5. Step 5: Solve for x
    x = 8,042,941,430.17/103,861.78
  6. Step 6: Final answer
    x = 77,438.89

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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.