Home / 103,639.84-143,019.48-58,318.72

Finding the Fourth Proportional to 103,639.84, 143,019.48 and 58,318.72

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Solution

The fourth proportional to 103,639.84, 143,019.48 and 58,318.72 is: 80,477.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.84 : 143,019.48 = 58,318.72 : x
  2. Step 2: Convert to fraction form
    103,639.84/143,019.48 = 58,318.72/x
  3. Step 3: Cross multiply
    103,639.84x = 143,019.48 × 58,318.72
  4. Step 4: Simplify right side
    103,639.84x = 8,340,713,008.67
  5. Step 5: Solve for x
    x = 8,340,713,008.67/103,639.84
  6. Step 6: Final answer
    x = 80,477.86

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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.