Home / 129,363.90-178,521.93-72,775.32

Finding the Fourth Proportional to 129,363.90, 178,521.93 and 72,775.32

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Solution

The fourth proportional to 129,363.90, 178,521.93 and 72,775.32 is: 100,429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,363.90 : 178,521.93 = 72,775.32 : x
  2. Step 2: Convert to fraction form
    129,363.90/178,521.93 = 72,775.32/x
  3. Step 3: Cross multiply
    129,363.90x = 178,521.93 × 72,775.32
  4. Step 4: Simplify right side
    129,363.90x = 12,991,990,582.77
  5. Step 5: Solve for x
    x = 12,991,990,582.77/129,363.90
  6. Step 6: Final answer
    x = 100,429.80

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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.