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Finding the Fourth Proportional to 108,420, 149,455.58 and 93,231.29

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Solution

The fourth proportional to 108,420, 149,455.58 and 93,231.29 is: 128,518.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,420 : 149,455.58 = 93,231.29 : x
  2. Step 2: Convert to fraction form
    108,420/149,455.58 = 93,231.29/x
  3. Step 3: Cross multiply
    108,420x = 149,455.58 × 93,231.29
  4. Step 4: Simplify right side
    108,420x = 13,933,935,307.66
  5. Step 5: Solve for x
    x = 13,933,935,307.66/108,420
  6. Step 6: Final answer
    x = 128,518.13

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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.