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Finding the Fourth Proportional to 51,888.99, 77,864.98 and 20,721.63

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Solution

The fourth proportional to 51,888.99, 77,864.98 and 20,721.63 is: 31,095.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,888.99 : 77,864.98 = 20,721.63 : x
  2. Step 2: Convert to fraction form
    51,888.99/77,864.98 = 20,721.63/x
  3. Step 3: Cross multiply
    51,888.99x = 77,864.98 × 20,721.63
  4. Step 4: Simplify right side
    51,888.99x = 1,613,489,305.52
  5. Step 5: Solve for x
    x = 1,613,489,305.52/51,888.99
  6. Step 6: Final answer
    x = 31,095.02

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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.