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Finding the Fourth Proportional to 163,290.70, 225,365.76 and 99,665.47

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Solution

The fourth proportional to 163,290.70, 225,365.76 and 99,665.47 is: 137,553.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,290.70 : 225,365.76 = 99,665.47 : x
  2. Step 2: Convert to fraction form
    163,290.70/225,365.76 = 99,665.47/x
  3. Step 3: Cross multiply
    163,290.70x = 225,365.76 × 99,665.47
  4. Step 4: Simplify right side
    163,290.70x = 22,461,184,392.31
  5. Step 5: Solve for x
    x = 22,461,184,392.31/163,290.70
  6. Step 6: Final answer
    x = 137,553.36

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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.