Home / 100,497.45-138,689.19-56,886.63

Finding the Fourth Proportional to 100,497.45, 138,689.19 and 56,886.63

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Solution

The fourth proportional to 100,497.45, 138,689.19 and 56,886.63 is: 78,505.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,497.45 : 138,689.19 = 56,886.63 : x
  2. Step 2: Convert to fraction form
    100,497.45/138,689.19 = 56,886.63/x
  3. Step 3: Cross multiply
    100,497.45x = 138,689.19 × 56,886.63
  4. Step 4: Simplify right side
    100,497.45x = 7,889,560,636.53
  5. Step 5: Solve for x
    x = 7,889,560,636.53/100,497.45
  6. Step 6: Final answer
    x = 78,505.08

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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.