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Finding the Fourth Proportional to 205,913.40, 308,870.10 and 72,792.60

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Solution

The fourth proportional to 205,913.40, 308,870.10 and 72,792.60 is: 109,188.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,913.40 : 308,870.10 = 72,792.60 : x
  2. Step 2: Convert to fraction form
    205,913.40/308,870.10 = 72,792.60/x
  3. Step 3: Cross multiply
    205,913.40x = 308,870.10 × 72,792.60
  4. Step 4: Simplify right side
    205,913.40x = 22,483,457,641.26
  5. Step 5: Solve for x
    x = 22,483,457,641.26/205,913.40
  6. Step 6: Final answer
    x = 109,188.90

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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.