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Finding the Fourth Proportional to 420,011.61, 630,016.20 and 104,468.51

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Solution

The fourth proportional to 420,011.61, 630,016.20 and 104,468.51 is: 156,702.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,011.61 : 630,016.20 = 104,468.51 : x
  2. Step 2: Convert to fraction form
    420,011.61/630,016.20 = 104,468.51/x
  3. Step 3: Cross multiply
    420,011.61x = 630,016.20 × 104,468.51
  4. Step 4: Simplify right side
    420,011.61x = 65,816,853,689.86
  5. Step 5: Solve for x
    x = 65,816,853,689.86/420,011.61
  6. Step 6: Final answer
    x = 156,702.46

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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.