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Finding the Fourth Proportional to 98,705.52, 136,203.12 and 58,420.98

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Solution

The fourth proportional to 98,705.52, 136,203.12 and 58,420.98 is: 80,614.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,705.52 : 136,203.12 = 58,420.98 : x
  2. Step 2: Convert to fraction form
    98,705.52/136,203.12 = 58,420.98/x
  3. Step 3: Cross multiply
    98,705.52x = 136,203.12 × 58,420.98
  4. Step 4: Simplify right side
    98,705.52x = 7,957,119,749.46
  5. Step 5: Solve for x
    x = 7,957,119,749.46/98,705.52
  6. Step 6: Final answer
    x = 80,614.74

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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.