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Finding the Fourth Proportional to 93,478.28, 139,993.95 and 53,915.45

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Solution

The fourth proportional to 93,478.28, 139,993.95 and 53,915.45 is: 80,744.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,478.28 : 139,993.95 = 53,915.45 : x
  2. Step 2: Convert to fraction form
    93,478.28/139,993.95 = 53,915.45/x
  3. Step 3: Cross multiply
    93,478.28x = 139,993.95 × 53,915.45
  4. Step 4: Simplify right side
    93,478.28x = 7,547,836,811.53
  5. Step 5: Solve for x
    x = 7,547,836,811.53/93,478.28
  6. Step 6: Final answer
    x = 80,744.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.