Home / 85,945.40-128,918.10-81,024.65

Finding the Fourth Proportional to 85,945.40, 128,918.10 and 81,024.65

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Solution

The fourth proportional to 85,945.40, 128,918.10 and 81,024.65 is: 121,536.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,945.40 : 128,918.10 = 81,024.65 : x
  2. Step 2: Convert to fraction form
    85,945.40/128,918.10 = 81,024.65/x
  3. Step 3: Cross multiply
    85,945.40x = 128,918.10 × 81,024.65
  4. Step 4: Simplify right side
    85,945.40x = 10,445,543,931.17
  5. Step 5: Solve for x
    x = 10,445,543,931.17/85,945.40
  6. Step 6: Final answer
    x = 121,536.98

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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.