Home / 86,648.48-129,973.84-30,490.32

Finding the Fourth Proportional to 86,648.48, 129,973.84 and 30,490.32

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Solution

The fourth proportional to 86,648.48, 129,973.84 and 30,490.32 is: 45,735.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,648.48 : 129,973.84 = 30,490.32 : x
  2. Step 2: Convert to fraction form
    86,648.48/129,973.84 = 30,490.32/x
  3. Step 3: Cross multiply
    86,648.48x = 129,973.84 × 30,490.32
  4. Step 4: Simplify right side
    86,648.48x = 3,962,943,973.23
  5. Step 5: Solve for x
    x = 3,962,943,973.23/86,648.48
  6. Step 6: Final answer
    x = 45,735.87

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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.