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Finding the Fourth Proportional to 156,980.70, 235,471.05 and 63,438.30

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Solution

The fourth proportional to 156,980.70, 235,471.05 and 63,438.30 is: 95,157.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,980.70 : 235,471.05 = 63,438.30 : x
  2. Step 2: Convert to fraction form
    156,980.70/235,471.05 = 63,438.30/x
  3. Step 3: Cross multiply
    156,980.70x = 235,471.05 × 63,438.30
  4. Step 4: Simplify right side
    156,980.70x = 14,937,883,111.22
  5. Step 5: Solve for x
    x = 14,937,883,111.22/156,980.70
  6. Step 6: Final answer
    x = 95,157.45

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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.