Home / 85,434.60-128,153.93-26,270.81

Finding the Fourth Proportional to 85,434.60, 128,153.93 and 26,270.81

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Solution

The fourth proportional to 85,434.60, 128,153.93 and 26,270.81 is: 39,406.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,434.60 : 128,153.93 = 26,270.81 : x
  2. Step 2: Convert to fraction form
    85,434.60/128,153.93 = 26,270.81/x
  3. Step 3: Cross multiply
    85,434.60x = 128,153.93 × 26,270.81
  4. Step 4: Simplify right side
    85,434.60x = 3,366,707,545.78
  5. Step 5: Solve for x
    x = 3,366,707,545.78/85,434.60
  6. Step 6: Final answer
    x = 39,406.84

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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.