Home / 85,750.50-128,638.20-26,590.93

Finding the Fourth Proportional to 85,750.50, 128,638.20 and 26,590.93

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Solution

The fourth proportional to 85,750.50, 128,638.20 and 26,590.93 is: 39,890.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,750.50 : 128,638.20 = 26,590.93 : x
  2. Step 2: Convert to fraction form
    85,750.50/128,638.20 = 26,590.93/x
  3. Step 3: Cross multiply
    85,750.50x = 128,638.20 × 26,590.93
  4. Step 4: Simplify right side
    85,750.50x = 3,420,609,798.45
  5. Step 5: Solve for x
    x = 3,420,609,798.45/85,750.50
  6. Step 6: Final answer
    x = 39,890.26

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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.