Home / 100,010.83-138,010.11-57,000.40

Finding the Fourth Proportional to 100,010.83, 138,010.11 and 57,000.40

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Solution

The fourth proportional to 100,010.83, 138,010.11 and 57,000.40 is: 78,657.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,010.83 : 138,010.11 = 57,000.40 : x
  2. Step 2: Convert to fraction form
    100,010.83/138,010.11 = 57,000.40/x
  3. Step 3: Cross multiply
    100,010.83x = 138,010.11 × 57,000.40
  4. Step 4: Simplify right side
    100,010.83x = 7,866,631,474.04
  5. Step 5: Solve for x
    x = 7,866,631,474.04/100,010.83
  6. Step 6: Final answer
    x = 78,657.80

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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.