Home / 74,129.76-102,298.35-40,137.39

Finding the Fourth Proportional to 74,129.76, 102,298.35 and 40,137.39

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Solution

The fourth proportional to 74,129.76, 102,298.35 and 40,137.39 is: 55,389.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,129.76 : 102,298.35 = 40,137.39 : x
  2. Step 2: Convert to fraction form
    74,129.76/102,298.35 = 40,137.39/x
  3. Step 3: Cross multiply
    74,129.76x = 102,298.35 × 40,137.39
  4. Step 4: Simplify right side
    74,129.76x = 4,105,988,770.31
  5. Step 5: Solve for x
    x = 4,105,988,770.31/74,129.76
  6. Step 6: Final answer
    x = 55,389.21

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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.