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Finding the Fourth Proportional to 90,866.70, 136,300.05 and 86,784.30

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Solution

The fourth proportional to 90,866.70, 136,300.05 and 86,784.30 is: 130,176.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,866.70 : 136,300.05 = 86,784.30 : x
  2. Step 2: Convert to fraction form
    90,866.70/136,300.05 = 86,784.30/x
  3. Step 3: Cross multiply
    90,866.70x = 136,300.05 × 86,784.30
  4. Step 4: Simplify right side
    90,866.70x = 11,828,704,429.22
  5. Step 5: Solve for x
    x = 11,828,704,429.22/90,866.70
  6. Step 6: Final answer
    x = 130,176.45

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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.