Home / 103,639.47-143,023.08-58,318.21

Finding the Fourth Proportional to 103,639.47, 143,023.08 and 58,318.21

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Solution

The fourth proportional to 103,639.47, 143,023.08 and 58,318.21 is: 80,479.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.47 : 143,023.08 = 58,318.21 : x
  2. Step 2: Convert to fraction form
    103,639.47/143,023.08 = 58,318.21/x
  3. Step 3: Cross multiply
    103,639.47x = 143,023.08 × 58,318.21
  4. Step 4: Simplify right side
    103,639.47x = 8,340,850,411.76
  5. Step 5: Solve for x
    x = 8,340,850,411.76/103,639.47
  6. Step 6: Final answer
    x = 80,479.48

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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.