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Finding the Fourth Proportional to 211,416.80, 291,755 and 115,925.08

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Solution

The fourth proportional to 211,416.80, 291,755 and 115,925.08 is: 159,976.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,416.80 : 291,755 = 115,925.08 : x
  2. Step 2: Convert to fraction form
    211,416.80/291,755 = 115,925.08/x
  3. Step 3: Cross multiply
    211,416.80x = 291,755 × 115,925.08
  4. Step 4: Simplify right side
    211,416.80x = 33,821,721,715.40
  5. Step 5: Solve for x
    x = 33,821,721,715.40/211,416.80
  6. Step 6: Final answer
    x = 159,976.51

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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.