Home / 85,655.16-128,435.76-26,474.40

Finding the Fourth Proportional to 85,655.16, 128,435.76 and 26,474.40

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Solution

The fourth proportional to 85,655.16, 128,435.76 and 26,474.40 is: 39,697.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,655.16 : 128,435.76 = 26,474.40 : x
  2. Step 2: Convert to fraction form
    85,655.16/128,435.76 = 26,474.40/x
  3. Step 3: Cross multiply
    85,655.16x = 128,435.76 × 26,474.40
  4. Step 4: Simplify right side
    85,655.16x = 3,400,259,684.54
  5. Step 5: Solve for x
    x = 3,400,259,684.54/85,655.16
  6. Step 6: Final answer
    x = 39,697.08

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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.