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Finding the Fourth Proportional to 89,647.70, 134,471.55 and 54,655.70

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Solution

The fourth proportional to 89,647.70, 134,471.55 and 54,655.70 is: 81,983.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,647.70 : 134,471.55 = 54,655.70 : x
  2. Step 2: Convert to fraction form
    89,647.70/134,471.55 = 54,655.70/x
  3. Step 3: Cross multiply
    89,647.70x = 134,471.55 × 54,655.70
  4. Step 4: Simplify right side
    89,647.70x = 7,349,636,695.34
  5. Step 5: Solve for x
    x = 7,349,636,695.34/89,647.70
  6. Step 6: Final answer
    x = 81,983.55

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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.