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Finding the Fourth Proportional to 156,698.80, 235,048.20 and 139,640.20

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Solution

The fourth proportional to 156,698.80, 235,048.20 and 139,640.20 is: 209,460.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,698.80 : 235,048.20 = 139,640.20 : x
  2. Step 2: Convert to fraction form
    156,698.80/235,048.20 = 139,640.20/x
  3. Step 3: Cross multiply
    156,698.80x = 235,048.20 × 139,640.20
  4. Step 4: Simplify right side
    156,698.80x = 32,822,177,657.64
  5. Step 5: Solve for x
    x = 32,822,177,657.64/156,698.80
  6. Step 6: Final answer
    x = 209,460.30

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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.