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Finding the Fourth Proportional to 292,636.80, 438,955.20 and 71,020.80

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Solution

The fourth proportional to 292,636.80, 438,955.20 and 71,020.80 is: 106,531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,636.80 : 438,955.20 = 71,020.80 : x
  2. Step 2: Convert to fraction form
    292,636.80/438,955.20 = 71,020.80/x
  3. Step 3: Cross multiply
    292,636.80x = 438,955.20 × 71,020.80
  4. Step 4: Simplify right side
    292,636.80x = 31,174,949,468.16
  5. Step 5: Solve for x
    x = 31,174,949,468.16/292,636.80
  6. Step 6: Final answer
    x = 106,531.20

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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.