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Finding the Fourth Proportional to 131,707.98, 197,582.40 and 42,940.80

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Solution

The fourth proportional to 131,707.98, 197,582.40 and 42,940.80 is: 64,417.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,707.98 : 197,582.40 = 42,940.80 : x
  2. Step 2: Convert to fraction form
    131,707.98/197,582.40 = 42,940.80/x
  3. Step 3: Cross multiply
    131,707.98x = 197,582.40 × 42,940.80
  4. Step 4: Simplify right side
    131,707.98x = 8,484,346,321.92
  5. Step 5: Solve for x
    x = 8,484,346,321.92/131,707.98
  6. Step 6: Final answer
    x = 64,417.86

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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.