Home / 103,059.18-142,219.17-57,739.05

Finding the Fourth Proportional to 103,059.18, 142,219.17 and 57,739.05

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Solution

The fourth proportional to 103,059.18, 142,219.17 and 57,739.05 is: 79,678.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,059.18 : 142,219.17 = 57,739.05 : x
  2. Step 2: Convert to fraction form
    103,059.18/142,219.17 = 57,739.05/x
  3. Step 3: Cross multiply
    103,059.18x = 142,219.17 × 57,739.05
  4. Step 4: Simplify right side
    103,059.18x = 8,211,599,767.59
  5. Step 5: Solve for x
    x = 8,211,599,767.59/103,059.18
  6. Step 6: Final answer
    x = 79,678.49

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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.