Home / 100,039.95-138,059.55-57,612.15

Finding the Fourth Proportional to 100,039.95, 138,059.55 and 57,612.15

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Solution

The fourth proportional to 100,039.95, 138,059.55 and 57,612.15 is: 79,507.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,039.95 : 138,059.55 = 57,612.15 : x
  2. Step 2: Convert to fraction form
    100,039.95/138,059.55 = 57,612.15/x
  3. Step 3: Cross multiply
    100,039.95x = 138,059.55 × 57,612.15
  4. Step 4: Simplify right side
    100,039.95x = 7,953,907,503.53
  5. Step 5: Solve for x
    x = 7,953,907,503.53/100,039.95
  6. Step 6: Final answer
    x = 79,507.31

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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.