Home / 86,585.10-129,877.65-85,127.10

Finding the Fourth Proportional to 86,585.10, 129,877.65 and 85,127.10

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Solution

The fourth proportional to 86,585.10, 129,877.65 and 85,127.10 is: 127,690.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,585.10 : 129,877.65 = 85,127.10 : x
  2. Step 2: Convert to fraction form
    86,585.10/129,877.65 = 85,127.10/x
  3. Step 3: Cross multiply
    86,585.10x = 129,877.65 × 85,127.10
  4. Step 4: Simplify right side
    86,585.10x = 11,056,107,699.32
  5. Step 5: Solve for x
    x = 11,056,107,699.32/86,585.10
  6. Step 6: Final answer
    x = 127,690.65

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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.