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Finding the Fourth Proportional to 99,654.80, 139,620.40 and 99,654.80

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Solution

The fourth proportional to 99,654.80, 139,620.40 and 99,654.80 is: 139,620.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,654.80 : 139,620.40 = 99,654.80 : x
  2. Step 2: Convert to fraction form
    99,654.80/139,620.40 = 99,654.80/x
  3. Step 3: Cross multiply
    99,654.80x = 139,620.40 × 99,654.80
  4. Step 4: Simplify right side
    99,654.80x = 13,913,843,037.92
  5. Step 5: Solve for x
    x = 13,913,843,037.92/99,654.80
  6. Step 6: Final answer
    x = 139,620.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.