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Finding the Fourth Proportional to 207,368.40, 310,822.20 and 89,019.60

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Solution

The fourth proportional to 207,368.40, 310,822.20 and 89,019.60 is: 133,430.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,368.40 : 310,822.20 = 89,019.60 : x
  2. Step 2: Convert to fraction form
    207,368.40/310,822.20 = 89,019.60/x
  3. Step 3: Cross multiply
    207,368.40x = 310,822.20 × 89,019.60
  4. Step 4: Simplify right side
    207,368.40x = 27,669,267,915.12
  5. Step 5: Solve for x
    x = 27,669,267,915.12/207,368.40
  6. Step 6: Final answer
    x = 133,430.49

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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.