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Finding the Fourth Proportional to 205,877.40, 308,840.98 and 72,730.40

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Solution

The fourth proportional to 205,877.40, 308,840.98 and 72,730.40 is: 109,104.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,877.40 : 308,840.98 = 72,730.40 : x
  2. Step 2: Convert to fraction form
    205,877.40/308,840.98 = 72,730.40/x
  3. Step 3: Cross multiply
    205,877.40x = 308,840.98 × 72,730.40
  4. Step 4: Simplify right side
    205,877.40x = 22,462,128,011.79
  5. Step 5: Solve for x
    x = 22,462,128,011.79/205,877.40
  6. Step 6: Final answer
    x = 109,104.39

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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.