Home / 85,979.07-129,056.09-57,810.51

Finding the Fourth Proportional to 85,979.07, 129,056.09 and 57,810.51

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Solution

The fourth proportional to 85,979.07, 129,056.09 and 57,810.51 is: 86,774.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,979.07 : 129,056.09 = 57,810.51 : x
  2. Step 2: Convert to fraction form
    85,979.07/129,056.09 = 57,810.51/x
  3. Step 3: Cross multiply
    85,979.07x = 129,056.09 × 57,810.51
  4. Step 4: Simplify right side
    85,979.07x = 7,460,798,092.45
  5. Step 5: Solve for x
    x = 7,460,798,092.45/85,979.07
  6. Step 6: Final answer
    x = 86,774.58

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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.