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Finding the Fourth Proportional to 611,357.20, 917,035.80 and 168,125.20

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Solution

The fourth proportional to 611,357.20, 917,035.80 and 168,125.20 is: 252,187.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,357.20 : 917,035.80 = 168,125.20 : x
  2. Step 2: Convert to fraction form
    611,357.20/917,035.80 = 168,125.20/x
  3. Step 3: Cross multiply
    611,357.20x = 917,035.80 × 168,125.20
  4. Step 4: Simplify right side
    611,357.20x = 154,176,827,282.16
  5. Step 5: Solve for x
    x = 154,176,827,282.16/611,357.20
  6. Step 6: Final answer
    x = 252,187.80

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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.