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Finding the Fourth Proportional to 312,564.80, 468,798.60 and 87,903.20

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Solution

The fourth proportional to 312,564.80, 468,798.60 and 87,903.20 is: 131,841.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,564.80 : 468,798.60 = 87,903.20 : x
  2. Step 2: Convert to fraction form
    312,564.80/468,798.60 = 87,903.20/x
  3. Step 3: Cross multiply
    312,564.80x = 468,798.60 × 87,903.20
  4. Step 4: Simplify right side
    312,564.80x = 41,208,897,095.52
  5. Step 5: Solve for x
    x = 41,208,897,095.52/312,564.80
  6. Step 6: Final answer
    x = 131,841.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.