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Finding the Fourth Proportional to 57,424.48, 85,807.28 and 43,840.47

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Solution

The fourth proportional to 57,424.48, 85,807.28 and 43,840.47 is: 65,509.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,424.48 : 85,807.28 = 43,840.47 : x
  2. Step 2: Convert to fraction form
    57,424.48/85,807.28 = 43,840.47/x
  3. Step 3: Cross multiply
    57,424.48x = 85,807.28 × 43,840.47
  4. Step 4: Simplify right side
    57,424.48x = 3,761,831,916.00
  5. Step 5: Solve for x
    x = 3,761,831,916.00/57,424.48
  6. Step 6: Final answer
    x = 65,509.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.