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Finding the Fourth Proportional to 93,123.12, 128,512.80 and 52,838.58

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Solution

The fourth proportional to 93,123.12, 128,512.80 and 52,838.58 is: 72,918.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,123.12 : 128,512.80 = 52,838.58 : x
  2. Step 2: Convert to fraction form
    93,123.12/128,512.80 = 52,838.58/x
  3. Step 3: Cross multiply
    93,123.12x = 128,512.80 × 52,838.58
  4. Step 4: Simplify right side
    93,123.12x = 6,790,433,863.82
  5. Step 5: Solve for x
    x = 6,790,433,863.82/93,123.12
  6. Step 6: Final answer
    x = 72,918.88

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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.