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Finding the Fourth Proportional to 168,762.80, 253,071.30 and 84,490.40

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Solution

The fourth proportional to 168,762.80, 253,071.30 and 84,490.40 is: 126,699.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,762.80 : 253,071.30 = 84,490.40 : x
  2. Step 2: Convert to fraction form
    168,762.80/253,071.30 = 84,490.40/x
  3. Step 3: Cross multiply
    168,762.80x = 253,071.30 × 84,490.40
  4. Step 4: Simplify right side
    168,762.80x = 21,382,095,365.52
  5. Step 5: Solve for x
    x = 21,382,095,365.52/168,762.80
  6. Step 6: Final answer
    x = 126,699.10

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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.