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Finding the Fourth Proportional to 153,634.54, 211,854 and 121,315.54

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Solution

The fourth proportional to 153,634.54, 211,854 and 121,315.54 is: 167,287.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,634.54 : 211,854 = 121,315.54 : x
  2. Step 2: Convert to fraction form
    153,634.54/211,854 = 121,315.54/x
  3. Step 3: Cross multiply
    153,634.54x = 211,854 × 121,315.54
  4. Step 4: Simplify right side
    153,634.54x = 25,701,182,411.16
  5. Step 5: Solve for x
    x = 25,701,182,411.16/153,634.54
  6. Step 6: Final answer
    x = 167,287.79

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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.