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Finding the Fourth Proportional to 53,139, 79,721.52 and 15,698.84

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Solution

The fourth proportional to 53,139, 79,721.52 and 15,698.84 is: 23,552.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,139 : 79,721.52 = 15,698.84 : x
  2. Step 2: Convert to fraction form
    53,139/79,721.52 = 15,698.84/x
  3. Step 3: Cross multiply
    53,139x = 79,721.52 × 15,698.84
  4. Step 4: Simplify right side
    53,139x = 1,251,535,387.04
  5. Step 5: Solve for x
    x = 1,251,535,387.04/53,139
  6. Step 6: Final answer
    x = 23,552.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.