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Finding the Fourth Proportional to 84,343.31, 116,318.38 and 69,980.40

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Solution

The fourth proportional to 84,343.31, 116,318.38 and 69,980.40 is: 96,510.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,343.31 : 116,318.38 = 69,980.40 : x
  2. Step 2: Convert to fraction form
    84,343.31/116,318.38 = 69,980.40/x
  3. Step 3: Cross multiply
    84,343.31x = 116,318.38 × 69,980.40
  4. Step 4: Simplify right side
    84,343.31x = 8,140,007,239.98
  5. Step 5: Solve for x
    x = 8,140,007,239.98/84,343.31
  6. Step 6: Final answer
    x = 96,510.41

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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.