Home / 85,985.10-128,977.65-50,906.70

Finding the Fourth Proportional to 85,985.10, 128,977.65 and 50,906.70

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Solution

The fourth proportional to 85,985.10, 128,977.65 and 50,906.70 is: 76,360.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,985.10 : 128,977.65 = 50,906.70 : x
  2. Step 2: Convert to fraction form
    85,985.10/128,977.65 = 50,906.70/x
  3. Step 3: Cross multiply
    85,985.10x = 128,977.65 × 50,906.70
  4. Step 4: Simplify right side
    85,985.10x = 6,565,826,535.26
  5. Step 5: Solve for x
    x = 6,565,826,535.26/85,985.10
  6. Step 6: Final answer
    x = 76,360.05

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1.5x scale

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.