Home / 100,783.02-139,077.08-55,456.76

Finding the Fourth Proportional to 100,783.02, 139,077.08 and 55,456.76

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Solution

The fourth proportional to 100,783.02, 139,077.08 and 55,456.76 is: 76,528.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,783.02 : 139,077.08 = 55,456.76 : x
  2. Step 2: Convert to fraction form
    100,783.02/139,077.08 = 55,456.76/x
  3. Step 3: Cross multiply
    100,783.02x = 139,077.08 × 55,456.76
  4. Step 4: Simplify right side
    100,783.02x = 7,712,764,456.11
  5. Step 5: Solve for x
    x = 7,712,764,456.11/100,783.02
  6. Step 6: Final answer
    x = 76,528.41

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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.