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Finding the Fourth Proportional to 206,897.40, 310,317.30 and 66,670.20

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Solution

The fourth proportional to 206,897.40, 310,317.30 and 66,670.20 is: 99,996.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,897.40 : 310,317.30 = 66,670.20 : x
  2. Step 2: Convert to fraction form
    206,897.40/310,317.30 = 66,670.20/x
  3. Step 3: Cross multiply
    206,897.40x = 310,317.30 × 66,670.20
  4. Step 4: Simplify right side
    206,897.40x = 20,688,916,454.46
  5. Step 5: Solve for x
    x = 20,688,916,454.46/206,897.40
  6. Step 6: Final answer
    x = 99,996.02

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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.