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Finding the Fourth Proportional to 93,236.64, 128,715.18 and 72,494.16

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Solution

The fourth proportional to 93,236.64, 128,715.18 and 72,494.16 is: 100,079.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,236.64 : 128,715.18 = 72,494.16 : x
  2. Step 2: Convert to fraction form
    93,236.64/128,715.18 = 72,494.16/x
  3. Step 3: Cross multiply
    93,236.64x = 128,715.18 × 72,494.16
  4. Step 4: Simplify right side
    93,236.64x = 9,331,098,853.35
  5. Step 5: Solve for x
    x = 9,331,098,853.35/93,236.64
  6. Step 6: Final answer
    x = 100,079.74

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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.