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Finding the Fourth Proportional to 91,483.80, 137,312.10 and 56,491.80

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Solution

The fourth proportional to 91,483.80, 137,312.10 and 56,491.80 is: 84,791.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,483.80 : 137,312.10 = 56,491.80 : x
  2. Step 2: Convert to fraction form
    91,483.80/137,312.10 = 56,491.80/x
  3. Step 3: Cross multiply
    91,483.80x = 137,312.10 × 56,491.80
  4. Step 4: Simplify right side
    91,483.80x = 7,757,007,690.78
  5. Step 5: Solve for x
    x = 7,757,007,690.78/91,483.80
  6. Step 6: Final answer
    x = 84,791.05

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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.