Home / 139,154.13-192,032.72-78,723.53

Finding the Fourth Proportional to 139,154.13, 192,032.72 and 78,723.53

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Solution

The fourth proportional to 139,154.13, 192,032.72 and 78,723.53 is: 108,638.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,154.13 : 192,032.72 = 78,723.53 : x
  2. Step 2: Convert to fraction form
    139,154.13/192,032.72 = 78,723.53/x
  3. Step 3: Cross multiply
    139,154.13x = 192,032.72 × 78,723.53
  4. Step 4: Simplify right side
    139,154.13x = 15,117,492,240.12
  5. Step 5: Solve for x
    x = 15,117,492,240.12/139,154.13
  6. Step 6: Final answer
    x = 108,638.47

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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.