Home / 139,547.12-192,580.09-79,942.64

Finding the Fourth Proportional to 139,547.12, 192,580.09 and 79,942.64

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Solution

The fourth proportional to 139,547.12, 192,580.09 and 79,942.64 is: 110,323.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,547.12 : 192,580.09 = 79,942.64 : x
  2. Step 2: Convert to fraction form
    139,547.12/192,580.09 = 79,942.64/x
  3. Step 3: Cross multiply
    139,547.12x = 192,580.09 × 79,942.64
  4. Step 4: Simplify right side
    139,547.12x = 15,395,359,643.28
  5. Step 5: Solve for x
    x = 15,395,359,643.28/139,547.12
  6. Step 6: Final answer
    x = 110,323.74

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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.