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Finding the Fourth Proportional to 103,251.84, 142,485.28 and 57,929.01

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Solution

The fourth proportional to 103,251.84, 142,485.28 and 57,929.01 is: 79,940.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,251.84 : 142,485.28 = 57,929.01 : x
  2. Step 2: Convert to fraction form
    103,251.84/142,485.28 = 57,929.01/x
  3. Step 3: Cross multiply
    103,251.84x = 142,485.28 × 57,929.01
  4. Step 4: Simplify right side
    103,251.84x = 8,254,031,209.97
  5. Step 5: Solve for x
    x = 8,254,031,209.97/103,251.84
  6. Step 6: Final answer
    x = 79,940.77

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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.