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Finding the Fourth Proportional to 145,513.60, 218,155.20 and 79,849.60

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Solution

The fourth proportional to 145,513.60, 218,155.20 and 79,849.60 is: 119,711.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,513.60 : 218,155.20 = 79,849.60 : x
  2. Step 2: Convert to fraction form
    145,513.60/218,155.20 = 79,849.60/x
  3. Step 3: Cross multiply
    145,513.60x = 218,155.20 × 79,849.60
  4. Step 4: Simplify right side
    145,513.60x = 17,419,605,457.92
  5. Step 5: Solve for x
    x = 17,419,605,457.92/145,513.60
  6. Step 6: Final answer
    x = 119,711.18

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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.