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Finding the Fourth Proportional to 165,581, 228,501.78 and 90,130.04

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Solution

The fourth proportional to 165,581, 228,501.78 and 90,130.04 is: 124,379.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,581 : 228,501.78 = 90,130.04 : x
  2. Step 2: Convert to fraction form
    165,581/228,501.78 = 90,130.04/x
  3. Step 3: Cross multiply
    165,581x = 228,501.78 × 90,130.04
  4. Step 4: Simplify right side
    165,581x = 20,594,874,571.47
  5. Step 5: Solve for x
    x = 20,594,874,571.47/165,581
  6. Step 6: Final answer
    x = 124,379.46

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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.