Home / 85,581.79-128,403.07-38,192.56

Finding the Fourth Proportional to 85,581.79, 128,403.07 and 38,192.56

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Solution

The fourth proportional to 85,581.79, 128,403.07 and 38,192.56 is: 57,302.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,581.79 : 128,403.07 = 38,192.56 : x
  2. Step 2: Convert to fraction form
    85,581.79/128,403.07 = 38,192.56/x
  3. Step 3: Cross multiply
    85,581.79x = 128,403.07 × 38,192.56
  4. Step 4: Simplify right side
    85,581.79x = 4,904,041,538.67
  5. Step 5: Solve for x
    x = 4,904,041,538.67/85,581.79
  6. Step 6: Final answer
    x = 57,302.40

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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.