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Finding the Fourth Proportional to 61,012.98, 91,266.75 and 57,280.50

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Solution

The fourth proportional to 61,012.98, 91,266.75 and 57,280.50 is: 85,683.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,012.98 : 91,266.75 = 57,280.50 : x
  2. Step 2: Convert to fraction form
    61,012.98/91,266.75 = 57,280.50/x
  3. Step 3: Cross multiply
    61,012.98x = 91,266.75 × 57,280.50
  4. Step 4: Simplify right side
    61,012.98x = 5,227,805,073.38
  5. Step 5: Solve for x
    x = 5,227,805,073.38/61,012.98
  6. Step 6: Final answer
    x = 85,683.49

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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.