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Finding the Fourth Proportional to 98,868.78, 136,448.69 and 56,433.69

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Solution

The fourth proportional to 98,868.78, 136,448.69 and 56,433.69 is: 77,884.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,868.78 : 136,448.69 = 56,433.69 : x
  2. Step 2: Convert to fraction form
    98,868.78/136,448.69 = 56,433.69/x
  3. Step 3: Cross multiply
    98,868.78x = 136,448.69 × 56,433.69
  4. Step 4: Simplify right side
    98,868.78x = 7,700,302,790.20
  5. Step 5: Solve for x
    x = 7,700,302,790.20/98,868.78
  6. Step 6: Final answer
    x = 77,884.07

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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.