Home / 78,130.02-107,819.22-42,320.13

Finding the Fourth Proportional to 78,130.02, 107,819.22 and 42,320.13

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Solution

The fourth proportional to 78,130.02, 107,819.22 and 42,320.13 is: 58,401.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,130.02 : 107,819.22 = 42,320.13 : x
  2. Step 2: Convert to fraction form
    78,130.02/107,819.22 = 42,320.13/x
  3. Step 3: Cross multiply
    78,130.02x = 107,819.22 × 42,320.13
  4. Step 4: Simplify right side
    78,130.02x = 4,562,923,406.90
  5. Step 5: Solve for x
    x = 4,562,923,406.90/78,130.02
  6. Step 6: Final answer
    x = 58,401.67

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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.