Home / 85,543.70-128,303.40-29,386.40

Finding the Fourth Proportional to 85,543.70, 128,303.40 and 29,386.40

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Solution

The fourth proportional to 85,543.70, 128,303.40 and 29,386.40 is: 44,075.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,543.70 : 128,303.40 = 29,386.40 : x
  2. Step 2: Convert to fraction form
    85,543.70/128,303.40 = 29,386.40/x
  3. Step 3: Cross multiply
    85,543.70x = 128,303.40 × 29,386.40
  4. Step 4: Simplify right side
    85,543.70x = 3,770,375,033.76
  5. Step 5: Solve for x
    x = 3,770,375,033.76/85,543.70
  6. Step 6: Final answer
    x = 44,075.43

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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.