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Finding the Fourth Proportional to 108,798.78, 163,085.90 and 45,655.58

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Solution

The fourth proportional to 108,798.78, 163,085.90 and 45,655.58 is: 68,436.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,798.78 : 163,085.90 = 45,655.58 : x
  2. Step 2: Convert to fraction form
    108,798.78/163,085.90 = 45,655.58/x
  3. Step 3: Cross multiply
    108,798.78x = 163,085.90 × 45,655.58
  4. Step 4: Simplify right side
    108,798.78x = 7,445,781,354.32
  5. Step 5: Solve for x
    x = 7,445,781,354.32/108,798.78
  6. Step 6: Final answer
    x = 68,436.26

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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.