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Finding the Fourth Proportional to 99,120.72, 136,786.70 and 53,798.70

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Solution

The fourth proportional to 99,120.72, 136,786.70 and 53,798.70 is: 74,242.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,120.72 : 136,786.70 = 53,798.70 : x
  2. Step 2: Convert to fraction form
    99,120.72/136,786.70 = 53,798.70/x
  3. Step 3: Cross multiply
    99,120.72x = 136,786.70 × 53,798.70
  4. Step 4: Simplify right side
    99,120.72x = 7,358,946,637.29
  5. Step 5: Solve for x
    x = 7,358,946,637.29/99,120.72
  6. Step 6: Final answer
    x = 74,242.26

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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.