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Finding the Fourth Proportional to 99,538.80, 149,135.40 and 64,460.40

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Solution

The fourth proportional to 99,538.80, 149,135.40 and 64,460.40 is: 96,578.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,538.80 : 149,135.40 = 64,460.40 : x
  2. Step 2: Convert to fraction form
    99,538.80/149,135.40 = 64,460.40/x
  3. Step 3: Cross multiply
    99,538.80x = 149,135.40 × 64,460.40
  4. Step 4: Simplify right side
    99,538.80x = 9,613,327,538.16
  5. Step 5: Solve for x
    x = 9,613,327,538.16/99,538.80
  6. Step 6: Final answer
    x = 96,578.70

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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.