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Finding the Fourth Proportional to 124,415.30, 171,717.09 and 81,971.30

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Solution

The fourth proportional to 124,415.30, 171,717.09 and 81,971.30 is: 113,136.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,415.30 : 171,717.09 = 81,971.30 : x
  2. Step 2: Convert to fraction form
    124,415.30/171,717.09 = 81,971.30/x
  3. Step 3: Cross multiply
    124,415.30x = 171,717.09 × 81,971.30
  4. Step 4: Simplify right side
    124,415.30x = 14,075,873,099.52
  5. Step 5: Solve for x
    x = 14,075,873,099.52/124,415.30
  6. Step 6: Final answer
    x = 113,136.19

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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.