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Finding the Fourth Proportional to 208,870.40, 313,305.60 and 103,894.40

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Solution

The fourth proportional to 208,870.40, 313,305.60 and 103,894.40 is: 155,841.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,870.40 : 313,305.60 = 103,894.40 : x
  2. Step 2: Convert to fraction form
    208,870.40/313,305.60 = 103,894.40/x
  3. Step 3: Cross multiply
    208,870.40x = 313,305.60 × 103,894.40
  4. Step 4: Simplify right side
    208,870.40x = 32,550,697,328.64
  5. Step 5: Solve for x
    x = 32,550,697,328.64/208,870.40
  6. Step 6: Final answer
    x = 155,841.60

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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.