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Finding the Fourth Proportional to 153,061.19, 211,266.11 and 99,343.07

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Solution

The fourth proportional to 153,061.19, 211,266.11 and 99,343.07 is: 137,120.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,061.19 : 211,266.11 = 99,343.07 : x
  2. Step 2: Convert to fraction form
    153,061.19/211,266.11 = 99,343.07/x
  3. Step 3: Cross multiply
    153,061.19x = 211,266.11 × 99,343.07
  4. Step 4: Simplify right side
    153,061.19x = 20,987,823,457.64
  5. Step 5: Solve for x
    x = 20,987,823,457.64/153,061.19
  6. Step 6: Final answer
    x = 137,120.48

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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.