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Finding the Fourth Proportional to 156,619.65, 216,023.47 and 143,740.41

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Solution

The fourth proportional to 156,619.65, 216,023.47 and 143,740.41 is: 198,259.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,619.65 : 216,023.47 = 143,740.41 : x
  2. Step 2: Convert to fraction form
    156,619.65/216,023.47 = 143,740.41/x
  3. Step 3: Cross multiply
    156,619.65x = 216,023.47 × 143,740.41
  4. Step 4: Simplify right side
    156,619.65x = 31,051,302,147.42
  5. Step 5: Solve for x
    x = 31,051,302,147.42/156,619.65
  6. Step 6: Final answer
    x = 198,259.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.