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Finding the Fourth Proportional to 93,420.14, 128,880.52 and 65,142.23

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Solution

The fourth proportional to 93,420.14, 128,880.52 and 65,142.23 is: 89,868.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,420.14 : 128,880.52 = 65,142.23 : x
  2. Step 2: Convert to fraction form
    93,420.14/128,880.52 = 65,142.23/x
  3. Step 3: Cross multiply
    93,420.14x = 128,880.52 × 65,142.23
  4. Step 4: Simplify right side
    93,420.14x = 8,395,563,669.10
  5. Step 5: Solve for x
    x = 8,395,563,669.10/93,420.14
  6. Step 6: Final answer
    x = 89,868.89

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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.