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Finding the Fourth Proportional to 86,735.66, 129,370.63 and 84,110.54

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Solution

The fourth proportional to 86,735.66, 129,370.63 and 84,110.54 is: 125,455.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,735.66 : 129,370.63 = 84,110.54 : x
  2. Step 2: Convert to fraction form
    86,735.66/129,370.63 = 84,110.54/x
  3. Step 3: Cross multiply
    86,735.66x = 129,370.63 × 84,110.54
  4. Step 4: Simplify right side
    86,735.66x = 10,881,433,128.89
  5. Step 5: Solve for x
    x = 10,881,433,128.89/86,735.66
  6. Step 6: Final answer
    x = 125,455.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.