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Finding the Fourth Proportional to 660,085.20, 990,127.80 and 161,449.20

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Solution

The fourth proportional to 660,085.20, 990,127.80 and 161,449.20 is: 242,173.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,085.20 : 990,127.80 = 161,449.20 : x
  2. Step 2: Convert to fraction form
    660,085.20/990,127.80 = 161,449.20/x
  3. Step 3: Cross multiply
    660,085.20x = 990,127.80 × 161,449.20
  4. Step 4: Simplify right side
    660,085.20x = 159,855,341,207.76
  5. Step 5: Solve for x
    x = 159,855,341,207.76/660,085.20
  6. Step 6: Final answer
    x = 242,173.80

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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.