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Finding the Fourth Proportional to 156,653.80, 234,980.70 and 139,595.20

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Solution

The fourth proportional to 156,653.80, 234,980.70 and 139,595.20 is: 209,392.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,653.80 : 234,980.70 = 139,595.20 : x
  2. Step 2: Convert to fraction form
    156,653.80/234,980.70 = 139,595.20/x
  3. Step 3: Cross multiply
    156,653.80x = 234,980.70 × 139,595.20
  4. Step 4: Simplify right side
    156,653.80x = 32,802,177,812.64
  5. Step 5: Solve for x
    x = 32,802,177,812.64/156,653.80
  6. Step 6: Final answer
    x = 209,392.80

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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.