Home / 100,987.14-139,339.80-57,964

Finding the Fourth Proportional to 100,987.14, 139,339.80 and 57,964

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Solution

The fourth proportional to 100,987.14, 139,339.80 and 57,964 is: 79,977.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,987.14 : 139,339.80 = 57,964 : x
  2. Step 2: Convert to fraction form
    100,987.14/139,339.80 = 57,964/x
  3. Step 3: Cross multiply
    100,987.14x = 139,339.80 × 57,964
  4. Step 4: Simplify right side
    100,987.14x = 8,076,692,167.20
  5. Step 5: Solve for x
    x = 8,076,692,167.20/100,987.14
  6. Step 6: Final answer
    x = 79,977.43

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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.