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Finding the Fourth Proportional to 93,419.96, 128,880.26 and 65,142.05

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Solution

The fourth proportional to 93,419.96, 128,880.26 and 65,142.05 is: 89,868.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,419.96 : 128,880.26 = 65,142.05 : x
  2. Step 2: Convert to fraction form
    93,419.96/128,880.26 = 65,142.05/x
  3. Step 3: Cross multiply
    93,419.96x = 128,880.26 × 65,142.05
  4. Step 4: Simplify right side
    93,419.96x = 8,395,523,370.82
  5. Step 5: Solve for x
    x = 8,395,523,370.82/93,419.96
  6. Step 6: Final answer
    x = 89,868.63

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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.