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Finding the Fourth Proportional to 78,963.84, 108,970.38 and 43,153.84

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Solution

The fourth proportional to 78,963.84, 108,970.38 and 43,153.84 is: 59,552.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,963.84 : 108,970.38 = 43,153.84 : x
  2. Step 2: Convert to fraction form
    78,963.84/108,970.38 = 43,153.84/x
  3. Step 3: Cross multiply
    78,963.84x = 108,970.38 × 43,153.84
  4. Step 4: Simplify right side
    78,963.84x = 4,702,490,479.47
  5. Step 5: Solve for x
    x = 4,702,490,479.47/78,963.84
  6. Step 6: Final answer
    x = 59,552.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.