Home / 78,020.19-107,649.14-47,392.67

Finding the Fourth Proportional to 78,020.19, 107,649.14 and 47,392.67

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Solution

The fourth proportional to 78,020.19, 107,649.14 and 47,392.67 is: 65,390.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,020.19 : 107,649.14 = 47,392.67 : x
  2. Step 2: Convert to fraction form
    78,020.19/107,649.14 = 47,392.67/x
  3. Step 3: Cross multiply
    78,020.19x = 107,649.14 × 47,392.67
  4. Step 4: Simplify right side
    78,020.19x = 5,101,780,199.96
  5. Step 5: Solve for x
    x = 5,101,780,199.96/78,020.19
  6. Step 6: Final answer
    x = 65,390.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.