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Finding the Fourth Proportional to 156,989.65, 235,484.48 and 143,211.55

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Solution

The fourth proportional to 156,989.65, 235,484.48 and 143,211.55 is: 214,817.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989.65 : 235,484.48 = 143,211.55 : x
  2. Step 2: Convert to fraction form
    156,989.65/235,484.48 = 143,211.55/x
  3. Step 3: Cross multiply
    156,989.65x = 235,484.48 × 143,211.55
  4. Step 4: Simplify right side
    156,989.65x = 33,724,097,381.74
  5. Step 5: Solve for x
    x = 33,724,097,381.74/156,989.65
  6. Step 6: Final answer
    x = 214,817.33

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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.