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Finding the Fourth Proportional to 207,385.40, 310,847.70 and 89,036.60

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Solution

The fourth proportional to 207,385.40, 310,847.70 and 89,036.60 is: 133,455.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,385.40 : 310,847.70 = 89,036.60 : x
  2. Step 2: Convert to fraction form
    207,385.40/310,847.70 = 89,036.60/x
  3. Step 3: Cross multiply
    207,385.40x = 310,847.70 × 89,036.60
  4. Step 4: Simplify right side
    207,385.40x = 27,676,822,325.82
  5. Step 5: Solve for x
    x = 27,676,822,325.82/207,385.40
  6. Step 6: Final answer
    x = 133,455.98

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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.