Home / 100,780.48-139,108.96-63,030.72

Finding the Fourth Proportional to 100,780.48, 139,108.96 and 63,030.72

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Solution

The fourth proportional to 100,780.48, 139,108.96 and 63,030.72 is: 87,002.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,780.48 : 139,108.96 = 63,030.72 : x
  2. Step 2: Convert to fraction form
    100,780.48/139,108.96 = 63,030.72/x
  3. Step 3: Cross multiply
    100,780.48x = 139,108.96 × 63,030.72
  4. Step 4: Simplify right side
    100,780.48x = 8,768,137,907.25
  5. Step 5: Solve for x
    x = 8,768,137,907.25/100,780.48
  6. Step 6: Final answer
    x = 87,002.34

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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.