Home / 86,319.69-129,442.41-30,142.95

Finding the Fourth Proportional to 86,319.69, 129,442.41 and 30,142.95

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Solution

The fourth proportional to 86,319.69, 129,442.41 and 30,142.95 is: 45,201.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,319.69 : 129,442.41 = 30,142.95 : x
  2. Step 2: Convert to fraction form
    86,319.69/129,442.41 = 30,142.95/x
  3. Step 3: Cross multiply
    86,319.69x = 129,442.41 × 30,142.95
  4. Step 4: Simplify right side
    86,319.69x = 3,901,776,092.51
  5. Step 5: Solve for x
    x = 3,901,776,092.51/86,319.69
  6. Step 6: Final answer
    x = 45,201.46

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1.5x scale

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.