Home / 100,070.12-138,113.70-57,620.84

Finding the Fourth Proportional to 100,070.12, 138,113.70 and 57,620.84

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Solution

The fourth proportional to 100,070.12, 138,113.70 and 57,620.84 is: 79,526.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,070.12 : 138,113.70 = 57,620.84 : x
  2. Step 2: Convert to fraction form
    100,070.12/138,113.70 = 57,620.84/x
  3. Step 3: Cross multiply
    100,070.12x = 138,113.70 × 57,620.84
  4. Step 4: Simplify right side
    100,070.12x = 7,958,227,409.51
  5. Step 5: Solve for x
    x = 7,958,227,409.51/100,070.12
  6. Step 6: Final answer
    x = 79,526.51

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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.