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Finding the Fourth Proportional to 55,959.42, 77,223.75 and 30,808.90

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Solution

The fourth proportional to 55,959.42, 77,223.75 and 30,808.90 is: 42,516.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,959.42 : 77,223.75 = 30,808.90 : x
  2. Step 2: Convert to fraction form
    55,959.42/77,223.75 = 30,808.90/x
  3. Step 3: Cross multiply
    55,959.42x = 77,223.75 × 30,808.90
  4. Step 4: Simplify right side
    55,959.42x = 2,379,178,791.38
  5. Step 5: Solve for x
    x = 2,379,178,791.38/55,959.42
  6. Step 6: Final answer
    x = 42,516.14

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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.