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Finding the Fourth Proportional to 99,009.70, 138,963.50 and 99,009.70

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Solution

The fourth proportional to 99,009.70, 138,963.50 and 99,009.70 is: 138,963.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,009.70 : 138,963.50 = 99,009.70 : x
  2. Step 2: Convert to fraction form
    99,009.70/138,963.50 = 99,009.70/x
  3. Step 3: Cross multiply
    99,009.70x = 138,963.50 × 99,009.70
  4. Step 4: Simplify right side
    99,009.70x = 13,758,734,445.95
  5. Step 5: Solve for x
    x = 13,758,734,445.95/99,009.70
  6. Step 6: Final answer
    x = 138,963.50

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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.