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Finding the Fourth Proportional to 207,387.40, 310,850.70 and 89,038.60

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Solution

The fourth proportional to 207,387.40, 310,850.70 and 89,038.60 is: 133,458.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,387.40 : 310,850.70 = 89,038.60 : x
  2. Step 2: Convert to fraction form
    207,387.40/310,850.70 = 89,038.60/x
  3. Step 3: Cross multiply
    207,387.40x = 310,850.70 × 89,038.60
  4. Step 4: Simplify right side
    207,387.40x = 27,677,711,137.02
  5. Step 5: Solve for x
    x = 27,677,711,137.02/207,387.40
  6. Step 6: Final answer
    x = 133,458.98

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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.