Home / 85,508.06-128,264.27-40,518.86

Finding the Fourth Proportional to 85,508.06, 128,264.27 and 40,518.86

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Solution

The fourth proportional to 85,508.06, 128,264.27 and 40,518.86 is: 60,779.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,508.06 : 128,264.27 = 40,518.86 : x
  2. Step 2: Convert to fraction form
    85,508.06/128,264.27 = 40,518.86/x
  3. Step 3: Cross multiply
    85,508.06x = 128,264.27 × 40,518.86
  4. Step 4: Simplify right side
    85,508.06x = 5,197,121,155.22
  5. Step 5: Solve for x
    x = 5,197,121,155.22/85,508.06
  6. Step 6: Final answer
    x = 60,779.32

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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.