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Finding the Fourth Proportional to 115,987.74, 160,026.48 and 64,993.38

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Solution

The fourth proportional to 115,987.74, 160,026.48 and 64,993.38 is: 89,670.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,987.74 : 160,026.48 = 64,993.38 : x
  2. Step 2: Convert to fraction form
    115,987.74/160,026.48 = 64,993.38/x
  3. Step 3: Cross multiply
    115,987.74x = 160,026.48 × 64,993.38
  4. Step 4: Simplify right side
    115,987.74x = 10,400,661,824.70
  5. Step 5: Solve for x
    x = 10,400,661,824.70/115,987.74
  6. Step 6: Final answer
    x = 89,670.36

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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.