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Finding the Fourth Proportional to 102,335.80, 153,503.70 and 66,906.40

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Solution

The fourth proportional to 102,335.80, 153,503.70 and 66,906.40 is: 100,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,335.80 : 153,503.70 = 66,906.40 : x
  2. Step 2: Convert to fraction form
    102,335.80/153,503.70 = 66,906.40/x
  3. Step 3: Cross multiply
    102,335.80x = 153,503.70 × 66,906.40
  4. Step 4: Simplify right side
    102,335.80x = 10,270,379,953.68
  5. Step 5: Solve for x
    x = 10,270,379,953.68/102,335.80
  6. Step 6: Final answer
    x = 100,359.60

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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.