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Finding the Fourth Proportional to 102,081.60, 153,122.40 and 90,806.40

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Solution

The fourth proportional to 102,081.60, 153,122.40 and 90,806.40 is: 136,209.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,081.60 : 153,122.40 = 90,806.40 : x
  2. Step 2: Convert to fraction form
    102,081.60/153,122.40 = 90,806.40/x
  3. Step 3: Cross multiply
    102,081.60x = 153,122.40 × 90,806.40
  4. Step 4: Simplify right side
    102,081.60x = 13,904,493,903.36
  5. Step 5: Solve for x
    x = 13,904,493,903.36/102,081.60
  6. Step 6: Final answer
    x = 136,209.60

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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.