Home / 103,639.21-143,011.90-58,316.06

Finding the Fourth Proportional to 103,639.21, 143,011.90 and 58,316.06

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Solution

The fourth proportional to 103,639.21, 143,011.90 and 58,316.06 is: 80,470.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.21 : 143,011.90 = 58,316.06 : x
  2. Step 2: Convert to fraction form
    103,639.21/143,011.90 = 58,316.06/x
  3. Step 3: Cross multiply
    103,639.21x = 143,011.90 × 58,316.06
  4. Step 4: Simplify right side
    103,639.21x = 8,339,890,541.11
  5. Step 5: Solve for x
    x = 8,339,890,541.11/103,639.21
  6. Step 6: Final answer
    x = 80,470.42

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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.