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Finding the Fourth Proportional to 306,070.10, 459,105.15 and 128,518.10

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Solution

The fourth proportional to 306,070.10, 459,105.15 and 128,518.10 is: 192,777.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,070.10 : 459,105.15 = 128,518.10 : x
  2. Step 2: Convert to fraction form
    306,070.10/459,105.15 = 128,518.10/x
  3. Step 3: Cross multiply
    306,070.10x = 459,105.15 × 128,518.10
  4. Step 4: Simplify right side
    306,070.10x = 59,003,321,578.22
  5. Step 5: Solve for x
    x = 59,003,321,578.22/306,070.10
  6. Step 6: Final answer
    x = 192,777.15

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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.