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Finding the Fourth Proportional to 93,138.87, 128,534.48 and 65,963.64

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Solution

The fourth proportional to 93,138.87, 128,534.48 and 65,963.64 is: 91,031.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,138.87 : 128,534.48 = 65,963.64 : x
  2. Step 2: Convert to fraction form
    93,138.87/128,534.48 = 65,963.64/x
  3. Step 3: Cross multiply
    93,138.87x = 128,534.48 × 65,963.64
  4. Step 4: Simplify right side
    93,138.87x = 8,478,602,166.31
  5. Step 5: Solve for x
    x = 8,478,602,166.31/93,138.87
  6. Step 6: Final answer
    x = 91,031.83

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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.