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Finding the Fourth Proportional to 520,068.10, 780,102.15 and 165,109.90

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Solution

The fourth proportional to 520,068.10, 780,102.15 and 165,109.90 is: 247,664.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,068.10 : 780,102.15 = 165,109.90 : x
  2. Step 2: Convert to fraction form
    520,068.10/780,102.15 = 165,109.90/x
  3. Step 3: Cross multiply
    520,068.10x = 780,102.15 × 165,109.90
  4. Step 4: Simplify right side
    520,068.10x = 128,802,587,976.29
  5. Step 5: Solve for x
    x = 128,802,587,976.29/520,068.10
  6. Step 6: Final answer
    x = 247,664.85

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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.