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Finding the Fourth Proportional to 84,393.76, 116,409.58 and 64,206.40

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Solution

The fourth proportional to 84,393.76, 116,409.58 and 64,206.40 is: 88,563.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,393.76 : 116,409.58 = 64,206.40 : x
  2. Step 2: Convert to fraction form
    84,393.76/116,409.58 = 64,206.40/x
  3. Step 3: Cross multiply
    84,393.76x = 116,409.58 × 64,206.40
  4. Step 4: Simplify right side
    84,393.76x = 7,474,240,057.31
  5. Step 5: Solve for x
    x = 7,474,240,057.31/84,393.76
  6. Step 6: Final answer
    x = 88,563.89

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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.