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Finding the Fourth Proportional to 210,478.86, 315,715.89 and 60,714.21

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Solution

The fourth proportional to 210,478.86, 315,715.89 and 60,714.21 is: 91,070.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,478.86 : 315,715.89 = 60,714.21 : x
  2. Step 2: Convert to fraction form
    210,478.86/315,715.89 = 60,714.21/x
  3. Step 3: Cross multiply
    210,478.86x = 315,715.89 × 60,714.21
  4. Step 4: Simplify right side
    210,478.86x = 19,168,440,845.80
  5. Step 5: Solve for x
    x = 19,168,440,845.80/210,478.86
  6. Step 6: Final answer
    x = 91,070.62

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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.