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Finding the Fourth Proportional to 258,703.01, 357,006.60 and 143,981.63

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Solution

The fourth proportional to 258,703.01, 357,006.60 and 143,981.63 is: 198,692.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,703.01 : 357,006.60 = 143,981.63 : x
  2. Step 2: Convert to fraction form
    258,703.01/357,006.60 = 143,981.63/x
  3. Step 3: Cross multiply
    258,703.01x = 357,006.60 × 143,981.63
  4. Step 4: Simplify right side
    258,703.01x = 51,402,392,188.76
  5. Step 5: Solve for x
    x = 51,402,392,188.76/258,703.01
  6. Step 6: Final answer
    x = 198,692.67

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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.