Home / 99,828.42-149,778.27-42,878.40

Finding the Fourth Proportional to 99,828.42, 149,778.27 and 42,878.40

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Solution

The fourth proportional to 99,828.42, 149,778.27 and 42,878.40 is: 64,332.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,828.42 : 149,778.27 = 42,878.40 : x
  2. Step 2: Convert to fraction form
    99,828.42/149,778.27 = 42,878.40/x
  3. Step 3: Cross multiply
    99,828.42x = 149,778.27 × 42,878.40
  4. Step 4: Simplify right side
    99,828.42x = 6,422,252,572.37
  5. Step 5: Solve for x
    x = 6,422,252,572.37/99,828.42
  6. Step 6: Final answer
    x = 64,332.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.