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Finding the Fourth Proportional to 93,422.58, 128,889.45 and 71,918.91

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Solution

The fourth proportional to 93,422.58, 128,889.45 and 71,918.91 is: 99,222.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,422.58 : 128,889.45 = 71,918.91 : x
  2. Step 2: Convert to fraction form
    93,422.58/128,889.45 = 71,918.91/x
  3. Step 3: Cross multiply
    93,422.58x = 128,889.45 × 71,918.91
  4. Step 4: Simplify right side
    93,422.58x = 9,269,588,754.50
  5. Step 5: Solve for x
    x = 9,269,588,754.50/93,422.58
  6. Step 6: Final answer
    x = 99,222.14

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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.