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Finding the Fourth Proportional to 85,698.95, 128,527.45 and 35,779.46

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Solution

The fourth proportional to 85,698.95, 128,527.45 and 35,779.46 is: 53,660.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,698.95 : 128,527.45 = 35,779.46 : x
  2. Step 2: Convert to fraction form
    85,698.95/128,527.45 = 35,779.46/x
  3. Step 3: Cross multiply
    85,698.95x = 128,527.45 × 35,779.46
  4. Step 4: Simplify right side
    85,698.95x = 4,598,642,756.18
  5. Step 5: Solve for x
    x = 4,598,642,756.18/85,698.95
  6. Step 6: Final answer
    x = 53,660.43

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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.