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Finding the Fourth Proportional to 155,893.60, 215,109.30 and 87,907.60

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Solution

The fourth proportional to 155,893.60, 215,109.30 and 87,907.60 is: 121,299.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,893.60 : 215,109.30 = 87,907.60 : x
  2. Step 2: Convert to fraction form
    155,893.60/215,109.30 = 87,907.60/x
  3. Step 3: Cross multiply
    155,893.60x = 215,109.30 × 87,907.60
  4. Step 4: Simplify right side
    155,893.60x = 18,909,742,300.68
  5. Step 5: Solve for x
    x = 18,909,742,300.68/155,893.60
  6. Step 6: Final answer
    x = 121,299.03

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1.5x scale

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.