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Finding the Fourth Proportional to 103,638.19, 143,019.98 and 58,926.19

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Solution

The fourth proportional to 103,638.19, 143,019.98 and 58,926.19 is: 81,317.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.19 : 143,019.98 = 58,926.19 : x
  2. Step 2: Convert to fraction form
    103,638.19/143,019.98 = 58,926.19/x
  3. Step 3: Cross multiply
    103,638.19x = 143,019.98 × 58,926.19
  4. Step 4: Simplify right side
    103,638.19x = 8,427,622,515.28
  5. Step 5: Solve for x
    x = 8,427,622,515.28/103,638.19
  6. Step 6: Final answer
    x = 81,317.73

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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.