Home / 74,129.40-102,298.76-40,138.30

Finding the Fourth Proportional to 74,129.40, 102,298.76 and 40,138.30

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Solution

The fourth proportional to 74,129.40, 102,298.76 and 40,138.30 is: 55,390.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,129.40 : 102,298.76 = 40,138.30 : x
  2. Step 2: Convert to fraction form
    74,129.40/102,298.76 = 40,138.30/x
  3. Step 3: Cross multiply
    74,129.40x = 102,298.76 × 40,138.30
  4. Step 4: Simplify right side
    74,129.40x = 4,106,098,318.51
  5. Step 5: Solve for x
    x = 4,106,098,318.51/74,129.40
  6. Step 6: Final answer
    x = 55,390.96

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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.