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Finding the Fourth Proportional to 93,410.90, 128,909.89 and 53,130.46

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Solution

The fourth proportional to 93,410.90, 128,909.89 and 53,130.46 is: 73,321.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,410.90 : 128,909.89 = 53,130.46 : x
  2. Step 2: Convert to fraction form
    93,410.90/128,909.89 = 53,130.46/x
  3. Step 3: Cross multiply
    93,410.90x = 128,909.89 × 53,130.46
  4. Step 4: Simplify right side
    93,410.90x = 6,849,040,844.05
  5. Step 5: Solve for x
    x = 6,849,040,844.05/93,410.90
  6. Step 6: Final answer
    x = 73,321.64

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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.