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Finding the Fourth Proportional to 85,920.93, 128,931.57 and 35,996.76

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Solution

The fourth proportional to 85,920.93, 128,931.57 and 35,996.76 is: 54,016.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,920.93 : 128,931.57 = 35,996.76 : x
  2. Step 2: Convert to fraction form
    85,920.93/128,931.57 = 35,996.76/x
  3. Step 3: Cross multiply
    85,920.93x = 128,931.57 × 35,996.76
  4. Step 4: Simplify right side
    85,920.93x = 4,641,118,781.71
  5. Step 5: Solve for x
    x = 4,641,118,781.71/85,920.93
  6. Step 6: Final answer
    x = 54,016.16

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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.