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Finding the Fourth Proportional to 153,347.65, 211,632.55 and 85,377.51

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Solution

The fourth proportional to 153,347.65, 211,632.55 and 85,377.51 is: 117,828.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,347.65 : 211,632.55 = 85,377.51 : x
  2. Step 2: Convert to fraction form
    153,347.65/211,632.55 = 85,377.51/x
  3. Step 3: Cross multiply
    153,347.65x = 211,632.55 × 85,377.51
  4. Step 4: Simplify right side
    153,347.65x = 18,068,659,940.51
  5. Step 5: Solve for x
    x = 18,068,659,940.51/153,347.65
  6. Step 6: Final answer
    x = 117,828.09

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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.