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Finding the Fourth Proportional to 280,703.70, 421,055.55 and 93,715.20

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Solution

The fourth proportional to 280,703.70, 421,055.55 and 93,715.20 is: 140,572.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,703.70 : 421,055.55 = 93,715.20 : x
  2. Step 2: Convert to fraction form
    280,703.70/421,055.55 = 93,715.20/x
  3. Step 3: Cross multiply
    280,703.70x = 421,055.55 × 93,715.20
  4. Step 4: Simplify right side
    280,703.70x = 39,459,305,079.36
  5. Step 5: Solve for x
    x = 39,459,305,079.36/280,703.70
  6. Step 6: Final answer
    x = 140,572.80

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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.