Home / 66,261.89-91,411.25-39,389.13

Finding the Fourth Proportional to 66,261.89, 91,411.25 and 39,389.13

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Solution

The fourth proportional to 66,261.89, 91,411.25 and 39,389.13 is: 54,339.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,261.89 : 91,411.25 = 39,389.13 : x
  2. Step 2: Convert to fraction form
    66,261.89/91,411.25 = 39,389.13/x
  3. Step 3: Cross multiply
    66,261.89x = 91,411.25 × 39,389.13
  4. Step 4: Simplify right side
    66,261.89x = 3,600,609,412.77
  5. Step 5: Solve for x
    x = 3,600,609,412.77/66,261.89
  6. Step 6: Final answer
    x = 54,339.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.