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Finding the Fourth Proportional to 100,509.60, 150,764.40 and 98,781.60

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Solution

The fourth proportional to 100,509.60, 150,764.40 and 98,781.60 is: 148,172.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,509.60 : 150,764.40 = 98,781.60 : x
  2. Step 2: Convert to fraction form
    100,509.60/150,764.40 = 98,781.60/x
  3. Step 3: Cross multiply
    100,509.60x = 150,764.40 × 98,781.60
  4. Step 4: Simplify right side
    100,509.60x = 14,892,748,655.04
  5. Step 5: Solve for x
    x = 14,892,748,655.04/100,509.60
  6. Step 6: Final answer
    x = 148,172.40

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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.