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Finding the Fourth Proportional to 420,527.58, 630,887.94 and 121,010.64

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Solution

The fourth proportional to 420,527.58, 630,887.94 and 121,010.64 is: 181,543.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,527.58 : 630,887.94 = 121,010.64 : x
  2. Step 2: Convert to fraction form
    420,527.58/630,887.94 = 121,010.64/x
  3. Step 3: Cross multiply
    420,527.58x = 630,887.94 × 121,010.64
  4. Step 4: Simplify right side
    420,527.58x = 76,344,153,387.68
  5. Step 5: Solve for x
    x = 76,344,153,387.68/420,527.58
  6. Step 6: Final answer
    x = 181,543.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.