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Finding the Fourth Proportional to 35,390.80, 53,129.40 and 35,131.60

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Solution

The fourth proportional to 35,390.80, 53,129.40 and 35,131.60 is: 52,740.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,390.80 : 53,129.40 = 35,131.60 : x
  2. Step 2: Convert to fraction form
    35,390.80/53,129.40 = 35,131.60/x
  3. Step 3: Cross multiply
    35,390.80x = 53,129.40 × 35,131.60
  4. Step 4: Simplify right side
    35,390.80x = 1,866,520,829.04
  5. Step 5: Solve for x
    x = 1,866,520,829.04/35,390.80
  6. Step 6: Final answer
    x = 52,740.28

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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.