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Finding the Fourth Proportional to 108,670.75, 149,792.42 and 85,663.08

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Solution

The fourth proportional to 108,670.75, 149,792.42 and 85,663.08 is: 118,078.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,670.75 : 149,792.42 = 85,663.08 : x
  2. Step 2: Convert to fraction form
    108,670.75/149,792.42 = 85,663.08/x
  3. Step 3: Cross multiply
    108,670.75x = 149,792.42 × 85,663.08
  4. Step 4: Simplify right side
    108,670.75x = 12,831,680,663.35
  5. Step 5: Solve for x
    x = 12,831,680,663.35/108,670.75
  6. Step 6: Final answer
    x = 118,078.51

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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.