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Finding the Fourth Proportional to 58,768.80, 88,135.20 and 19,316.80

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Solution

The fourth proportional to 58,768.80, 88,135.20 and 19,316.80 is: 28,969.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,768.80 : 88,135.20 = 19,316.80 : x
  2. Step 2: Convert to fraction form
    58,768.80/88,135.20 = 19,316.80/x
  3. Step 3: Cross multiply
    58,768.80x = 88,135.20 × 19,316.80
  4. Step 4: Simplify right side
    58,768.80x = 1,702,490,031.36
  5. Step 5: Solve for x
    x = 1,702,490,031.36/58,768.80
  6. Step 6: Final answer
    x = 28,969.28

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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.