Home / 103,240.95-142,458.86-57,917.21

Finding the Fourth Proportional to 103,240.95, 142,458.86 and 57,917.21

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Solution

The fourth proportional to 103,240.95, 142,458.86 and 57,917.21 is: 79,918.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,240.95 : 142,458.86 = 57,917.21 : x
  2. Step 2: Convert to fraction form
    103,240.95/142,458.86 = 57,917.21/x
  3. Step 3: Cross multiply
    103,240.95x = 142,458.86 × 57,917.21
  4. Step 4: Simplify right side
    103,240.95x = 8,250,818,709.10
  5. Step 5: Solve for x
    x = 8,250,818,709.10/103,240.95
  6. Step 6: Final answer
    x = 79,918.08

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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.