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Finding the Fourth Proportional to 153,053.77, 211,212.63 and 87,633.92

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Solution

The fourth proportional to 153,053.77, 211,212.63 and 87,633.92 is: 120,933.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,053.77 : 211,212.63 = 87,633.92 : x
  2. Step 2: Convert to fraction form
    153,053.77/211,212.63 = 87,633.92/x
  3. Step 3: Cross multiply
    153,053.77x = 211,212.63 × 87,633.92
  4. Step 4: Simplify right side
    153,053.77x = 18,509,390,720.41
  5. Step 5: Solve for x
    x = 18,509,390,720.41/153,053.77
  6. Step 6: Final answer
    x = 120,933.91

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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.