Home / 86,415.84-129,637.44-30,254.59

Finding the Fourth Proportional to 86,415.84, 129,637.44 and 30,254.59

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Solution

The fourth proportional to 86,415.84, 129,637.44 and 30,254.59 is: 45,386.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,415.84 : 129,637.44 = 30,254.59 : x
  2. Step 2: Convert to fraction form
    86,415.84/129,637.44 = 30,254.59/x
  3. Step 3: Cross multiply
    86,415.84x = 129,637.44 × 30,254.59
  4. Step 4: Simplify right side
    86,415.84x = 3,922,127,595.85
  5. Step 5: Solve for x
    x = 3,922,127,595.85/86,415.84
  6. Step 6: Final answer
    x = 45,386.67

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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.