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Finding the Fourth Proportional to 99,703.20, 139,934.40 and 99,703.20

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Solution

The fourth proportional to 99,703.20, 139,934.40 and 99,703.20 is: 139,934.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,703.20 : 139,934.40 = 99,703.20 : x
  2. Step 2: Convert to fraction form
    99,703.20/139,934.40 = 99,703.20/x
  3. Step 3: Cross multiply
    99,703.20x = 139,934.40 × 99,703.20
  4. Step 4: Simplify right side
    99,703.20x = 13,951,907,470.08
  5. Step 5: Solve for x
    x = 13,951,907,470.08/99,703.20
  6. Step 6: Final answer
    x = 139,934.40

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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.