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Finding the Fourth Proportional to 207,389.40, 310,853.70 and 89,040.60

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Solution

The fourth proportional to 207,389.40, 310,853.70 and 89,040.60 is: 133,461.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,389.40 : 310,853.70 = 89,040.60 : x
  2. Step 2: Convert to fraction form
    207,389.40/310,853.70 = 89,040.60/x
  3. Step 3: Cross multiply
    207,389.40x = 310,853.70 × 89,040.60
  4. Step 4: Simplify right side
    207,389.40x = 27,678,599,960.22
  5. Step 5: Solve for x
    x = 27,678,599,960.22/207,389.40
  6. Step 6: Final answer
    x = 133,461.98

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1.5x scale

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.