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Finding the Fourth Proportional to 117,012.75, 161,411.99 and 71,712.69

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Solution

The fourth proportional to 117,012.75, 161,411.99 and 71,712.69 is: 98,923.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,012.75 : 161,411.99 = 71,712.69 : x
  2. Step 2: Convert to fraction form
    117,012.75/161,411.99 = 71,712.69/x
  3. Step 3: Cross multiply
    117,012.75x = 161,411.99 × 71,712.69
  4. Step 4: Simplify right side
    117,012.75x = 11,575,287,642.59
  5. Step 5: Solve for x
    x = 11,575,287,642.59/117,012.75
  6. Step 6: Final answer
    x = 98,923.30

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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.