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Finding the Fourth Proportional to 98,783.48, 136,300.20 and 58,509.92

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Solution

The fourth proportional to 98,783.48, 136,300.20 and 58,509.92 is: 80,731.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,783.48 : 136,300.20 = 58,509.92 : x
  2. Step 2: Convert to fraction form
    98,783.48/136,300.20 = 58,509.92/x
  3. Step 3: Cross multiply
    98,783.48x = 136,300.20 × 58,509.92
  4. Step 4: Simplify right side
    98,783.48x = 7,974,913,797.98
  5. Step 5: Solve for x
    x = 7,974,913,797.98/98,783.48
  6. Step 6: Final answer
    x = 80,731.25

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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.