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Finding the Fourth Proportional to 111,480, 153,792.16 and 66,159.90

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Solution

The fourth proportional to 111,480, 153,792.16 and 66,159.90 is: 91,270.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,480 : 153,792.16 = 66,159.90 : x
  2. Step 2: Convert to fraction form
    111,480/153,792.16 = 66,159.90/x
  3. Step 3: Cross multiply
    111,480x = 153,792.16 × 66,159.90
  4. Step 4: Simplify right side
    111,480x = 10,174,873,926.38
  5. Step 5: Solve for x
    x = 10,174,873,926.38/111,480
  6. Step 6: Final answer
    x = 91,270.85

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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.