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Finding the Fourth Proportional to 100,908.88, 139,254.28 and 58,492.01

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Solution

The fourth proportional to 100,908.88, 139,254.28 and 58,492.01 is: 80,718.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,908.88 : 139,254.28 = 58,492.01 : x
  2. Step 2: Convert to fraction form
    100,908.88/139,254.28 = 58,492.01/x
  3. Step 3: Cross multiply
    100,908.88x = 139,254.28 × 58,492.01
  4. Step 4: Simplify right side
    100,908.88x = 8,145,262,738.30
  5. Step 5: Solve for x
    x = 8,145,262,738.30/100,908.88
  6. Step 6: Final answer
    x = 80,718.99

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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.