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Finding the Fourth Proportional to 103,009.46, 155,216.09 and 84,699.66

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Solution

The fourth proportional to 103,009.46, 155,216.09 and 84,699.66 is: 127,626.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,009.46 : 155,216.09 = 84,699.66 : x
  2. Step 2: Convert to fraction form
    103,009.46/155,216.09 = 84,699.66/x
  3. Step 3: Cross multiply
    103,009.46x = 155,216.09 × 84,699.66
  4. Step 4: Simplify right side
    103,009.46x = 13,146,749,626.03
  5. Step 5: Solve for x
    x = 13,146,749,626.03/103,009.46
  6. Step 6: Final answer
    x = 127,626.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.