Home / 280,727.18-421,045.58-78,328.52

Finding the Fourth Proportional to 280,727.18, 421,045.58 and 78,328.52

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Solution

The fourth proportional to 280,727.18, 421,045.58 and 78,328.52 is: 117,480.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,727.18 : 421,045.58 = 78,328.52 : x
  2. Step 2: Convert to fraction form
    280,727.18/421,045.58 = 78,328.52/x
  3. Step 3: Cross multiply
    280,727.18x = 421,045.58 × 78,328.52
  4. Step 4: Simplify right side
    280,727.18x = 32,979,877,133.94
  5. Step 5: Solve for x
    x = 32,979,877,133.94/280,727.18
  6. Step 6: Final answer
    x = 117,480.17

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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.