Home / 85,538.90-128,300.10-26,358.68

Finding the Fourth Proportional to 85,538.90, 128,300.10 and 26,358.68

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Solution

The fourth proportional to 85,538.90, 128,300.10 and 26,358.68 is: 39,535.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,538.90 : 128,300.10 = 26,358.68 : x
  2. Step 2: Convert to fraction form
    85,538.90/128,300.10 = 26,358.68/x
  3. Step 3: Cross multiply
    85,538.90x = 128,300.10 × 26,358.68
  4. Step 4: Simplify right side
    85,538.90x = 3,381,820,506.57
  5. Step 5: Solve for x
    x = 3,381,820,506.57/85,538.90
  6. Step 6: Final answer
    x = 39,535.47

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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.