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Finding the Fourth Proportional to 85,920.84, 128,899.98 and 35,320.23

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Solution

The fourth proportional to 85,920.84, 128,899.98 and 35,320.23 is: 52,988.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,920.84 : 128,899.98 = 35,320.23 : x
  2. Step 2: Convert to fraction form
    85,920.84/128,899.98 = 35,320.23/x
  3. Step 3: Cross multiply
    85,920.84x = 128,899.98 × 35,320.23
  4. Step 4: Simplify right side
    85,920.84x = 4,552,776,940.60
  5. Step 5: Solve for x
    x = 4,552,776,940.60/85,920.84
  6. Step 6: Final answer
    x = 52,988.04

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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.