Home / 78,347.09-108,118.36-42,536.38

Finding the Fourth Proportional to 78,347.09, 108,118.36 and 42,536.38

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Solution

The fourth proportional to 78,347.09, 108,118.36 and 42,536.38 is: 58,699.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,347.09 : 108,118.36 = 42,536.38 : x
  2. Step 2: Convert to fraction form
    78,347.09/108,118.36 = 42,536.38/x
  3. Step 3: Cross multiply
    78,347.09x = 108,118.36 × 42,536.38
  4. Step 4: Simplify right side
    78,347.09x = 4,598,963,645.94
  5. Step 5: Solve for x
    x = 4,598,963,645.94/78,347.09
  6. Step 6: Final answer
    x = 58,699.87

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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.