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Finding the Fourth Proportional to 115,971.68, 160,036.44 and 65,670.80

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Solution

The fourth proportional to 115,971.68, 160,036.44 and 65,670.80 is: 90,623.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,971.68 : 160,036.44 = 65,670.80 : x
  2. Step 2: Convert to fraction form
    115,971.68/160,036.44 = 65,670.80/x
  3. Step 3: Cross multiply
    115,971.68x = 160,036.44 × 65,670.80
  4. Step 4: Simplify right side
    115,971.68x = 10,509,721,043.95
  5. Step 5: Solve for x
    x = 10,509,721,043.95/115,971.68
  6. Step 6: Final answer
    x = 90,623.17

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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.