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Finding the Fourth Proportional to 156,912.70, 235,369.05 and 145,392.70

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Solution

The fourth proportional to 156,912.70, 235,369.05 and 145,392.70 is: 218,089.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,912.70 : 235,369.05 = 145,392.70 : x
  2. Step 2: Convert to fraction form
    156,912.70/235,369.05 = 145,392.70/x
  3. Step 3: Cross multiply
    156,912.70x = 235,369.05 × 145,392.70
  4. Step 4: Simplify right side
    156,912.70x = 34,220,941,675.94
  5. Step 5: Solve for x
    x = 34,220,941,675.94/156,912.70
  6. Step 6: Final answer
    x = 218,089.05

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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.