Home / 78,122.04-107,807.13-42,311.76

Finding the Fourth Proportional to 78,122.04, 107,807.13 and 42,311.76

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Solution

The fourth proportional to 78,122.04, 107,807.13 and 42,311.76 is: 58,389.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,122.04 : 107,807.13 = 42,311.76 : x
  2. Step 2: Convert to fraction form
    78,122.04/107,807.13 = 42,311.76/x
  3. Step 3: Cross multiply
    78,122.04x = 107,807.13 × 42,311.76
  4. Step 4: Simplify right side
    78,122.04x = 4,561,509,410.85
  5. Step 5: Solve for x
    x = 4,561,509,410.85/78,122.04
  6. Step 6: Final answer
    x = 58,389.53

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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.