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Finding the Fourth Proportional to 156,980.70, 235,600.65 and 72,870.30

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Solution

The fourth proportional to 156,980.70, 235,600.65 and 72,870.30 is: 109,365.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,980.70 : 235,600.65 = 72,870.30 : x
  2. Step 2: Convert to fraction form
    156,980.70/235,600.65 = 72,870.30/x
  3. Step 3: Cross multiply
    156,980.70x = 235,600.65 × 72,870.30
  4. Step 4: Simplify right side
    156,980.70x = 17,168,290,045.70
  5. Step 5: Solve for x
    x = 17,168,290,045.70/156,980.70
  6. Step 6: Final answer
    x = 109,365.61

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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.