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Finding the Fourth Proportional to 420,020.52, 630,030.80 and 124,532.52

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Solution

The fourth proportional to 420,020.52, 630,030.80 and 124,532.52 is: 186,798.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,020.52 : 630,030.80 = 124,532.52 : x
  2. Step 2: Convert to fraction form
    420,020.52/630,030.80 = 124,532.52/x
  3. Step 3: Cross multiply
    420,020.52x = 630,030.80 × 124,532.52
  4. Step 4: Simplify right side
    420,020.52x = 78,459,323,201.62
  5. Step 5: Solve for x
    x = 78,459,323,201.62/420,020.52
  6. Step 6: Final answer
    x = 186,798.79

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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.