Home / 205,787.40-308,681.10-72,666.60

Finding the Fourth Proportional to 205,787.40, 308,681.10 and 72,666.60

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Solution

The fourth proportional to 205,787.40, 308,681.10 and 72,666.60 is: 108,999.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,787.40 : 308,681.10 = 72,666.60 : x
  2. Step 2: Convert to fraction form
    205,787.40/308,681.10 = 72,666.60/x
  3. Step 3: Cross multiply
    205,787.40x = 308,681.10 × 72,666.60
  4. Step 4: Simplify right side
    205,787.40x = 22,430,806,021.26
  5. Step 5: Solve for x
    x = 22,430,806,021.26/205,787.40
  6. Step 6: Final answer
    x = 108,999.90

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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.