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Finding the Fourth Proportional to 125,013.84, 172,356.16 and 79,675.28

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Solution

The fourth proportional to 125,013.84, 172,356.16 and 79,675.28 is: 109,848.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,013.84 : 172,356.16 = 79,675.28 : x
  2. Step 2: Convert to fraction form
    125,013.84/172,356.16 = 79,675.28/x
  3. Step 3: Cross multiply
    125,013.84x = 172,356.16 × 79,675.28
  4. Step 4: Simplify right side
    125,013.84x = 13,732,525,307.72
  5. Step 5: Solve for x
    x = 13,732,525,307.72/125,013.84
  6. Step 6: Final answer
    x = 109,848.04

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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.