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Finding the Fourth Proportional to 61,373.80, 91,931.10 and 54,807.40

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Solution

The fourth proportional to 61,373.80, 91,931.10 and 54,807.40 is: 82,095.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,373.80 : 91,931.10 = 54,807.40 : x
  2. Step 2: Convert to fraction form
    61,373.80/91,931.10 = 54,807.40/x
  3. Step 3: Cross multiply
    61,373.80x = 91,931.10 × 54,807.40
  4. Step 4: Simplify right side
    61,373.80x = 5,038,504,570.14
  5. Step 5: Solve for x
    x = 5,038,504,570.14/61,373.80
  6. Step 6: Final answer
    x = 82,095.37

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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.