Home / 86,569.90-129,964.20-46,620.70

Finding the Fourth Proportional to 86,569.90, 129,964.20 and 46,620.70

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Solution

The fourth proportional to 86,569.90, 129,964.20 and 46,620.70 is: 69,989.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,569.90 : 129,964.20 = 46,620.70 : x
  2. Step 2: Convert to fraction form
    86,569.90/129,964.20 = 46,620.70/x
  3. Step 3: Cross multiply
    86,569.90x = 129,964.20 × 46,620.70
  4. Step 4: Simplify right side
    86,569.90x = 6,059,021,978.94
  5. Step 5: Solve for x
    x = 6,059,021,978.94/86,569.90
  6. Step 6: Final answer
    x = 69,989.94

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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.