Home / 86,029,440.40-128,894,861.40-72,592,512.40

Finding the Fourth Proportional to 86,029,440.40, 128,894,861.40 and 72,592,512.40

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Solution

The fourth proportional to 86,029,440.40, 128,894,861.40 and 72,592,512.40 is: 108,762,788.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,029,440.40 : 128,894,861.40 = 72,592,512.40 : x
  2. Step 2: Convert to fraction form
    86,029,440.40/128,894,861.40 = 72,592,512.40/x
  3. Step 3: Cross multiply
    86,029,440.40x = 128,894,861.40 × 72,592,512.40
  4. Step 4: Simplify right side
    86,029,440.40x = 9,356,801,824,475,782
  5. Step 5: Solve for x
    x = 9,356,801,824,475,782/86,029,440.40
  6. Step 6: Final answer
    x = 108,762,788.42

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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.