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Finding the Fourth Proportional to 93,123.68, 128,505.12 and 52,284.80

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Solution

The fourth proportional to 93,123.68, 128,505.12 and 52,284.80 is: 72,149.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,123.68 : 128,505.12 = 52,284.80 : x
  2. Step 2: Convert to fraction form
    93,123.68/128,505.12 = 52,284.80/x
  3. Step 3: Cross multiply
    93,123.68x = 128,505.12 × 52,284.80
  4. Step 4: Simplify right side
    93,123.68x = 6,718,864,498.18
  5. Step 5: Solve for x
    x = 6,718,864,498.18/93,123.68
  6. Step 6: Final answer
    x = 72,149.90

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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.