Home / 66,278.09-99,420.21-18,896.40

Finding the Fourth Proportional to 66,278.09, 99,420.21 and 18,896.40

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Solution

The fourth proportional to 66,278.09, 99,420.21 and 18,896.40 is: 28,345.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,278.09 : 99,420.21 = 18,896.40 : x
  2. Step 2: Convert to fraction form
    66,278.09/99,420.21 = 18,896.40/x
  3. Step 3: Cross multiply
    66,278.09x = 99,420.21 × 18,896.40
  4. Step 4: Simplify right side
    66,278.09x = 1,878,684,056.24
  5. Step 5: Solve for x
    x = 1,878,684,056.24/66,278.09
  6. Step 6: Final answer
    x = 28,345.48

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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.