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Finding the Fourth Proportional to 260,108.57, 390,162.86 and 73,120.07

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Solution

The fourth proportional to 260,108.57, 390,162.86 and 73,120.07 is: 109,680.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,108.57 : 390,162.86 = 73,120.07 : x
  2. Step 2: Convert to fraction form
    260,108.57/390,162.86 = 73,120.07/x
  3. Step 3: Cross multiply
    260,108.57x = 390,162.86 × 73,120.07
  4. Step 4: Simplify right side
    260,108.57x = 28,528,736,518.61
  5. Step 5: Solve for x
    x = 28,528,736,518.61/260,108.57
  6. Step 6: Final answer
    x = 109,680.11

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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.