Home / 85,329.28-128,051.05-35,409.42

Finding the Fourth Proportional to 85,329.28, 128,051.05 and 35,409.42

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Solution

The fourth proportional to 85,329.28, 128,051.05 and 35,409.42 is: 53,137.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,329.28 : 128,051.05 = 35,409.42 : x
  2. Step 2: Convert to fraction form
    85,329.28/128,051.05 = 35,409.42/x
  3. Step 3: Cross multiply
    85,329.28x = 128,051.05 × 35,409.42
  4. Step 4: Simplify right side
    85,329.28x = 4,534,213,628.86
  5. Step 5: Solve for x
    x = 4,534,213,628.86/85,329.28
  6. Step 6: Final answer
    x = 53,137.84

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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.