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Finding the Fourth Proportional to 55,871.62, 77,102.83 and 30,721.12

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Solution

The fourth proportional to 55,871.62, 77,102.83 and 30,721.12 is: 42,395.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,871.62 : 77,102.83 = 30,721.12 : x
  2. Step 2: Convert to fraction form
    55,871.62/77,102.83 = 30,721.12/x
  3. Step 3: Cross multiply
    55,871.62x = 77,102.83 × 30,721.12
  4. Step 4: Simplify right side
    55,871.62x = 2,368,685,292.77
  5. Step 5: Solve for x
    x = 2,368,685,292.77/55,871.62
  6. Step 6: Final answer
    x = 42,395.14

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1.5x scale

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.