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Finding the Fourth Proportional to 103,967.40, 143,476.18 and 56,221.68

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Solution

The fourth proportional to 103,967.40, 143,476.18 and 56,221.68 is: 77,586.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,967.40 : 143,476.18 = 56,221.68 : x
  2. Step 2: Convert to fraction form
    103,967.40/143,476.18 = 56,221.68/x
  3. Step 3: Cross multiply
    103,967.40x = 143,476.18 × 56,221.68
  4. Step 4: Simplify right side
    103,967.40x = 8,066,471,879.58
  5. Step 5: Solve for x
    x = 8,066,471,879.58/103,967.40
  6. Step 6: Final answer
    x = 77,586.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.