Home / 120,815.40-181,223.10-89,711.40

Finding the Fourth Proportional to 120,815.40, 181,223.10 and 89,711.40

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Solution

The fourth proportional to 120,815.40, 181,223.10 and 89,711.40 is: 134,567.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,815.40 : 181,223.10 = 89,711.40 : x
  2. Step 2: Convert to fraction form
    120,815.40/181,223.10 = 89,711.40/x
  3. Step 3: Cross multiply
    120,815.40x = 181,223.10 × 89,711.40
  4. Step 4: Simplify right side
    120,815.40x = 16,257,778,013.34
  5. Step 5: Solve for x
    x = 16,257,778,013.34/120,815.40
  6. Step 6: Final answer
    x = 134,567.10

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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.