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Finding the Fourth Proportional to 89,989.70, 134,970.66 and 30,019.23

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Solution

The fourth proportional to 89,989.70, 134,970.66 and 30,019.23 is: 45,024.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,989.70 : 134,970.66 = 30,019.23 : x
  2. Step 2: Convert to fraction form
    89,989.70/134,970.66 = 30,019.23/x
  3. Step 3: Cross multiply
    89,989.70x = 134,970.66 × 30,019.23
  4. Step 4: Simplify right side
    89,989.70x = 4,051,715,285.79
  5. Step 5: Solve for x
    x = 4,051,715,285.79/89,989.70
  6. Step 6: Final answer
    x = 45,024.21

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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.