Home / 78,118.58-107,803.02-42,307.76

Finding the Fourth Proportional to 78,118.58, 107,803.02 and 42,307.76

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Solution

The fourth proportional to 78,118.58, 107,803.02 and 42,307.76 is: 58,384.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,118.58 : 107,803.02 = 42,307.76 : x
  2. Step 2: Convert to fraction form
    78,118.58/107,803.02 = 42,307.76/x
  3. Step 3: Cross multiply
    78,118.58x = 107,803.02 × 42,307.76
  4. Step 4: Simplify right side
    78,118.58x = 4,560,904,297.44
  5. Step 5: Solve for x
    x = 4,560,904,297.44/78,118.58
  6. Step 6: Final answer
    x = 58,384.37

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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.