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Finding the Fourth Proportional to 666,642.48, 999,970.20 and 168,006.48

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Solution

The fourth proportional to 666,642.48, 999,970.20 and 168,006.48 is: 252,011.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,642.48 : 999,970.20 = 168,006.48 : x
  2. Step 2: Convert to fraction form
    666,642.48/999,970.20 = 168,006.48/x
  3. Step 3: Cross multiply
    666,642.48x = 999,970.20 × 168,006.48
  4. Step 4: Simplify right side
    666,642.48x = 168,001,473,406.90
  5. Step 5: Solve for x
    x = 168,001,473,406.90/666,642.48
  6. Step 6: Final answer
    x = 252,011.35

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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.