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Finding the Fourth Proportional to 155,390.68, 214,437 and 87,402.52

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Solution

The fourth proportional to 155,390.68, 214,437 and 87,402.52 is: 120,614.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,390.68 : 214,437 = 87,402.52 : x
  2. Step 2: Convert to fraction form
    155,390.68/214,437 = 87,402.52/x
  3. Step 3: Cross multiply
    155,390.68x = 214,437 × 87,402.52
  4. Step 4: Simplify right side
    155,390.68x = 18,742,334,181.24
  5. Step 5: Solve for x
    x = 18,742,334,181.24/155,390.68
  6. Step 6: Final answer
    x = 120,614.27

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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.