Home / 100,113.20-138,152.76-55,398.32

Finding the Fourth Proportional to 100,113.20, 138,152.76 and 55,398.32

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Solution

The fourth proportional to 100,113.20, 138,152.76 and 55,398.32 is: 76,447.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,113.20 : 138,152.76 = 55,398.32 : x
  2. Step 2: Convert to fraction form
    100,113.20/138,152.76 = 55,398.32/x
  3. Step 3: Cross multiply
    100,113.20x = 138,152.76 × 55,398.32
  4. Step 4: Simplify right side
    100,113.20x = 7,653,430,807.36
  5. Step 5: Solve for x
    x = 7,653,430,807.36/100,113.20
  6. Step 6: Final answer
    x = 76,447.77

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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.