Home / 100,908.08-139,247.04-58,459.28

Finding the Fourth Proportional to 100,908.08, 139,247.04 and 58,459.28

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Solution

The fourth proportional to 100,908.08, 139,247.04 and 58,459.28 is: 80,670.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,908.08 : 139,247.04 = 58,459.28 : x
  2. Step 2: Convert to fraction form
    100,908.08/139,247.04 = 58,459.28/x
  3. Step 3: Cross multiply
    100,908.08x = 139,247.04 × 58,459.28
  4. Step 4: Simplify right side
    100,908.08x = 8,140,281,700.53
  5. Step 5: Solve for x
    x = 8,140,281,700.53/100,908.08
  6. Step 6: Final answer
    x = 80,670.27

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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.