Home / 100,320.39-138,444.71-56,709.43

Finding the Fourth Proportional to 100,320.39, 138,444.71 and 56,709.43

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Solution

The fourth proportional to 100,320.39, 138,444.71 and 56,709.43 is: 78,260.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,320.39 : 138,444.71 = 56,709.43 : x
  2. Step 2: Convert to fraction form
    100,320.39/138,444.71 = 56,709.43/x
  3. Step 3: Cross multiply
    100,320.39x = 138,444.71 × 56,709.43
  4. Step 4: Simplify right side
    100,320.39x = 7,851,119,960.96
  5. Step 5: Solve for x
    x = 7,851,119,960.96/100,320.39
  6. Step 6: Final answer
    x = 78,260.46

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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.