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Finding the Fourth Proportional to 93,423.60, 140,135.40 and 72,428.40

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Solution

The fourth proportional to 93,423.60, 140,135.40 and 72,428.40 is: 108,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,423.60 : 140,135.40 = 72,428.40 : x
  2. Step 2: Convert to fraction form
    93,423.60/140,135.40 = 72,428.40/x
  3. Step 3: Cross multiply
    93,423.60x = 140,135.40 × 72,428.40
  4. Step 4: Simplify right side
    93,423.60x = 10,149,782,805.36
  5. Step 5: Solve for x
    x = 10,149,782,805.36/93,423.60
  6. Step 6: Final answer
    x = 108,642.60

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1.5x scale

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.