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Finding the Fourth Proportional to 112,992.78, 155,931.03 and 65,254.26

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Solution

The fourth proportional to 112,992.78, 155,931.03 and 65,254.26 is: 90,051.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,992.78 : 155,931.03 = 65,254.26 : x
  2. Step 2: Convert to fraction form
    112,992.78/155,931.03 = 65,254.26/x
  3. Step 3: Cross multiply
    112,992.78x = 155,931.03 × 65,254.26
  4. Step 4: Simplify right side
    112,992.78x = 10,175,163,973.69
  5. Step 5: Solve for x
    x = 10,175,163,973.69/112,992.78
  6. Step 6: Final answer
    x = 90,051.45

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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.