Home / 90,390.10-135,408.67-42,937.67

Finding the Fourth Proportional to 90,390.10, 135,408.67 and 42,937.67

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Solution

The fourth proportional to 90,390.10, 135,408.67 and 42,937.67 is: 64,322.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,390.10 : 135,408.67 = 42,937.67 : x
  2. Step 2: Convert to fraction form
    90,390.10/135,408.67 = 42,937.67/x
  3. Step 3: Cross multiply
    90,390.10x = 135,408.67 × 42,937.67
  4. Step 4: Simplify right side
    90,390.10x = 5,814,132,787.60
  5. Step 5: Solve for x
    x = 5,814,132,787.60/90,390.10
  6. Step 6: Final answer
    x = 64,322.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.