Home / 85,919,857.92-128,839,829.76-31,294,415.52

Finding the Fourth Proportional to 85,919,857.92, 128,839,829.76 and 31,294,415.52

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Solution

The fourth proportional to 85,919,857.92, 128,839,829.76 and 31,294,415.52 is: 46,927,069.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,919,857.92 : 128,839,829.76 = 31,294,415.52 : x
  2. Step 2: Convert to fraction form
    85,919,857.92/128,839,829.76 = 31,294,415.52/x
  3. Step 3: Cross multiply
    85,919,857.92x = 128,839,829.76 × 31,294,415.52
  4. Step 4: Simplify right side
    85,919,857.92x = 4,031,967,168,035,502
  5. Step 5: Solve for x
    x = 4,031,967,168,035,502/85,919,857.92
  6. Step 6: Final answer
    x = 46,927,069.78

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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.