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Finding the Fourth Proportional to 85,920.18, 128,913.16 and 48,522.48

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Solution

The fourth proportional to 85,920.18, 128,913.16 and 48,522.48 is: 72,802.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,920.18 : 128,913.16 = 48,522.48 : x
  2. Step 2: Convert to fraction form
    85,920.18/128,913.16 = 48,522.48/x
  3. Step 3: Cross multiply
    85,920.18x = 128,913.16 × 48,522.48
  4. Step 4: Simplify right side
    85,920.18x = 6,255,186,227.84
  5. Step 5: Solve for x
    x = 6,255,186,227.84/85,920.18
  6. Step 6: Final answer
    x = 72,802.29

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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.