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Finding the Fourth Proportional to 112,915, 155,820.90 and 61,928.92

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Solution

The fourth proportional to 112,915, 155,820.90 and 61,928.92 is: 85,460.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,915 : 155,820.90 = 61,928.92 : x
  2. Step 2: Convert to fraction form
    112,915/155,820.90 = 61,928.92/x
  3. Step 3: Cross multiply
    112,915x = 155,820.90 × 61,928.92
  4. Step 4: Simplify right side
    112,915x = 9,649,820,050.43
  5. Step 5: Solve for x
    x = 9,649,820,050.43/112,915
  6. Step 6: Final answer
    x = 85,460.92

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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.