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Finding the Fourth Proportional to 207,312.90, 310,969.35 and 67,085.70

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Solution

The fourth proportional to 207,312.90, 310,969.35 and 67,085.70 is: 100,628.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,312.90 : 310,969.35 = 67,085.70 : x
  2. Step 2: Convert to fraction form
    207,312.90/310,969.35 = 67,085.70/x
  3. Step 3: Cross multiply
    207,312.90x = 310,969.35 × 67,085.70
  4. Step 4: Simplify right side
    207,312.90x = 20,861,596,523.30
  5. Step 5: Solve for x
    x = 20,861,596,523.30/207,312.90
  6. Step 6: Final answer
    x = 100,628.55

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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.