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Finding the Fourth Proportional to 218,681.48, 301,781.84 and 121,891.47

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Solution

The fourth proportional to 218,681.48, 301,781.84 and 121,891.47 is: 168,211.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,681.48 : 301,781.84 = 121,891.47 : x
  2. Step 2: Convert to fraction form
    218,681.48/301,781.84 = 121,891.47/x
  3. Step 3: Cross multiply
    218,681.48x = 301,781.84 × 121,891.47
  4. Step 4: Simplify right side
    218,681.48x = 36,784,630,668.64
  5. Step 5: Solve for x
    x = 36,784,630,668.64/218,681.48
  6. Step 6: Final answer
    x = 168,211.00

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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.