Home / 81,430,100.10-112,336,087.68-72,147,138.30

Finding the Fourth Proportional to 81,430,100.10, 112,336,087.68 and 72,147,138.30

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Solution

The fourth proportional to 81,430,100.10, 112,336,087.68 and 72,147,138.30 is: 99,529,869.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430,100.10 : 112,336,087.68 = 72,147,138.30 : x
  2. Step 2: Convert to fraction form
    81,430,100.10/112,336,087.68 = 72,147,138.30/x
  3. Step 3: Cross multiply
    81,430,100.10x = 112,336,087.68 × 72,147,138.30
  4. Step 4: Simplify right side
    81,430,100.10x = 8,104,727,253,929,886
  5. Step 5: Solve for x
    x = 8,104,727,253,929,886/81,430,100.10
  6. Step 6: Final answer
    x = 99,529,869.72

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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.