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Finding the Fourth Proportional to 108,707.67, 149,843.04 and 85,699.98

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Solution

The fourth proportional to 108,707.67, 149,843.04 and 85,699.98 is: 118,129.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,707.67 : 149,843.04 = 85,699.98 : x
  2. Step 2: Convert to fraction form
    108,707.67/149,843.04 = 85,699.98/x
  3. Step 3: Cross multiply
    108,707.67x = 149,843.04 × 85,699.98
  4. Step 4: Simplify right side
    108,707.67x = 12,841,545,531.14
  5. Step 5: Solve for x
    x = 12,841,545,531.14/108,707.67
  6. Step 6: Final answer
    x = 118,129.16

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1.5x scale

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.