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Finding the Fourth Proportional to 90,890.37, 125,420.40 and 67,030.20

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Solution

The fourth proportional to 90,890.37, 125,420.40 and 67,030.20 is: 92,495.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,890.37 : 125,420.40 = 67,030.20 : x
  2. Step 2: Convert to fraction form
    90,890.37/125,420.40 = 67,030.20/x
  3. Step 3: Cross multiply
    90,890.37x = 125,420.40 × 67,030.20
  4. Step 4: Simplify right side
    90,890.37x = 8,406,954,496.08
  5. Step 5: Solve for x
    x = 8,406,954,496.08/90,890.37
  6. Step 6: Final answer
    x = 92,495.55

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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.