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Finding the Fourth Proportional to 212,763.60, 319,030.20 and 88,117.20

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Solution

The fourth proportional to 212,763.60, 319,030.20 and 88,117.20 is: 132,128.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,763.60 : 319,030.20 = 88,117.20 : x
  2. Step 2: Convert to fraction form
    212,763.60/319,030.20 = 88,117.20/x
  3. Step 3: Cross multiply
    212,763.60x = 319,030.20 × 88,117.20
  4. Step 4: Simplify right side
    212,763.60x = 28,112,047,939.44
  5. Step 5: Solve for x
    x = 28,112,047,939.44/212,763.60
  6. Step 6: Final answer
    x = 132,128.09

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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.