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Finding the Fourth Proportional to 128,085.66, 176,755.14 and 74,369.16

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Solution

The fourth proportional to 128,085.66, 176,755.14 and 74,369.16 is: 102,627.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,085.66 : 176,755.14 = 74,369.16 : x
  2. Step 2: Convert to fraction form
    128,085.66/176,755.14 = 74,369.16/x
  3. Step 3: Cross multiply
    128,085.66x = 176,755.14 × 74,369.16
  4. Step 4: Simplify right side
    128,085.66x = 13,145,131,287.48
  5. Step 5: Solve for x
    x = 13,145,131,287.48/128,085.66
  6. Step 6: Final answer
    x = 102,627.66

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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.