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Finding the Fourth Proportional to 99,430.42, 137,213.94 and 54,718.42

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Solution

The fourth proportional to 99,430.42, 137,213.94 and 54,718.42 is: 75,511.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,430.42 : 137,213.94 = 54,718.42 : x
  2. Step 2: Convert to fraction form
    99,430.42/137,213.94 = 54,718.42/x
  3. Step 3: Cross multiply
    99,430.42x = 137,213.94 × 54,718.42
  4. Step 4: Simplify right side
    99,430.42x = 7,508,129,998.77
  5. Step 5: Solve for x
    x = 7,508,129,998.77/99,430.42
  6. Step 6: Final answer
    x = 75,511.40

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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.