Home / 100,972.36-139,342.02-58,555.72

Finding the Fourth Proportional to 100,972.36, 139,342.02 and 58,555.72

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Solution

The fourth proportional to 100,972.36, 139,342.02 and 58,555.72 is: 80,806.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,972.36 : 139,342.02 = 58,555.72 : x
  2. Step 2: Convert to fraction form
    100,972.36/139,342.02 = 58,555.72/x
  3. Step 3: Cross multiply
    100,972.36x = 139,342.02 × 58,555.72
  4. Step 4: Simplify right side
    100,972.36x = 8,159,272,307.35
  5. Step 5: Solve for x
    x = 8,159,272,307.35/100,972.36
  6. Step 6: Final answer
    x = 80,806.99

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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.