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Finding the Fourth Proportional to 108,435.84, 149,607.36 and 60,681.60

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Solution

The fourth proportional to 108,435.84, 149,607.36 and 60,681.60 is: 83,721.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,435.84 : 149,607.36 = 60,681.60 : x
  2. Step 2: Convert to fraction form
    108,435.84/149,607.36 = 60,681.60/x
  3. Step 3: Cross multiply
    108,435.84x = 149,607.36 × 60,681.60
  4. Step 4: Simplify right side
    108,435.84x = 9,078,413,976.58
  5. Step 5: Solve for x
    x = 9,078,413,976.58/108,435.84
  6. Step 6: Final answer
    x = 83,721.53

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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.