Home / 85,699.32-128,528.02-35,779.84

Finding the Fourth Proportional to 85,699.32, 128,528.02 and 35,779.84

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Solution

The fourth proportional to 85,699.32, 128,528.02 and 35,779.84 is: 53,661.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,699.32 : 128,528.02 = 35,779.84 : x
  2. Step 2: Convert to fraction form
    85,699.32/128,528.02 = 35,779.84/x
  3. Step 3: Cross multiply
    85,699.32x = 128,528.02 × 35,779.84
  4. Step 4: Simplify right side
    85,699.32x = 4,598,711,991.12
  5. Step 5: Solve for x
    x = 4,598,711,991.12/85,699.32
  6. Step 6: Final answer
    x = 53,661.01

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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.