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Finding the Fourth Proportional to 495,167.80, 742,751.70 and 121,190.80

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Solution

The fourth proportional to 495,167.80, 742,751.70 and 121,190.80 is: 181,786.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,167.80 : 742,751.70 = 121,190.80 : x
  2. Step 2: Convert to fraction form
    495,167.80/742,751.70 = 121,190.80/x
  3. Step 3: Cross multiply
    495,167.80x = 742,751.70 × 121,190.80
  4. Step 4: Simplify right side
    495,167.80x = 90,014,672,724.36
  5. Step 5: Solve for x
    x = 90,014,672,724.36/495,167.80
  6. Step 6: Final answer
    x = 181,786.20

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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.