Home / 100,981.24-139,345.92-58,542.50

Finding the Fourth Proportional to 100,981.24, 139,345.92 and 58,542.50

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Solution

The fourth proportional to 100,981.24, 139,345.92 and 58,542.50 is: 80,783.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,981.24 : 139,345.92 = 58,542.50 : x
  2. Step 2: Convert to fraction form
    100,981.24/139,345.92 = 58,542.50/x
  3. Step 3: Cross multiply
    100,981.24x = 139,345.92 × 58,542.50
  4. Step 4: Simplify right side
    100,981.24x = 8,157,658,911.70
  5. Step 5: Solve for x
    x = 8,157,658,911.70/100,981.24
  6. Step 6: Final answer
    x = 80,783.91

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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.