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Finding the Fourth Proportional to 93,428.82, 128,931.75 and 57,639.60

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Solution

The fourth proportional to 93,428.82, 128,931.75 and 57,639.60 is: 79,542.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,428.82 : 128,931.75 = 57,639.60 : x
  2. Step 2: Convert to fraction form
    93,428.82/128,931.75 = 57,639.60/x
  3. Step 3: Cross multiply
    93,428.82x = 128,931.75 × 57,639.60
  4. Step 4: Simplify right side
    93,428.82x = 7,431,574,497.30
  5. Step 5: Solve for x
    x = 7,431,574,497.30/93,428.82
  6. Step 6: Final answer
    x = 79,542.63

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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.