Home / 66,386.40-99,579.60-57,638.40

Finding the Fourth Proportional to 66,386.40, 99,579.60 and 57,638.40

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Solution

The fourth proportional to 66,386.40, 99,579.60 and 57,638.40 is: 86,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,386.40 : 99,579.60 = 57,638.40 : x
  2. Step 2: Convert to fraction form
    66,386.40/99,579.60 = 57,638.40/x
  3. Step 3: Cross multiply
    66,386.40x = 99,579.60 × 57,638.40
  4. Step 4: Simplify right side
    66,386.40x = 5,739,608,816.64
  5. Step 5: Solve for x
    x = 5,739,608,816.64/66,386.40
  6. Step 6: Final answer
    x = 86,457.60

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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.