Home / 86,027,838.40-128,892,458.40-72,590,910.40

Finding the Fourth Proportional to 86,027,838.40, 128,892,458.40 and 72,590,910.40

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Solution

The fourth proportional to 86,027,838.40, 128,892,458.40 and 72,590,910.40 is: 108,760,385.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,027,838.40 : 128,892,458.40 = 72,590,910.40 : x
  2. Step 2: Convert to fraction form
    86,027,838.40/128,892,458.40 = 72,590,910.40/x
  3. Step 3: Cross multiply
    86,027,838.40x = 128,892,458.40 × 72,590,910.40
  4. Step 4: Simplify right side
    86,027,838.40x = 9,356,420,898,950,128
  5. Step 5: Solve for x
    x = 9,356,420,898,950,128/86,027,838.40
  6. Step 6: Final answer
    x = 108,760,385.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.