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Finding the Fourth Proportional to 89,969.40, 134,838.90 and 69,089.40

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Solution

The fourth proportional to 89,969.40, 134,838.90 and 69,089.40 is: 103,545.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,969.40 : 134,838.90 = 69,089.40 : x
  2. Step 2: Convert to fraction form
    89,969.40/134,838.90 = 69,089.40/x
  3. Step 3: Cross multiply
    89,969.40x = 134,838.90 × 69,089.40
  4. Step 4: Simplify right side
    89,969.40x = 9,315,938,697.66
  5. Step 5: Solve for x
    x = 9,315,938,697.66/89,969.40
  6. Step 6: Final answer
    x = 103,545.64

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1.5x scale

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.