Home / 100,427.42-138,588.64-57,985.04

Finding the Fourth Proportional to 100,427.42, 138,588.64 and 57,985.04

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Solution

The fourth proportional to 100,427.42, 138,588.64 and 57,985.04 is: 80,018.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,427.42 : 138,588.64 = 57,985.04 : x
  2. Step 2: Convert to fraction form
    100,427.42/138,588.64 = 57,985.04/x
  3. Step 3: Cross multiply
    100,427.42x = 138,588.64 × 57,985.04
  4. Step 4: Simplify right side
    100,427.42x = 8,036,068,035.45
  5. Step 5: Solve for x
    x = 8,036,068,035.45/100,427.42
  6. Step 6: Final answer
    x = 80,018.66

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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.