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Finding the Fourth Proportional to 129,973.50, 179,363.91 and 70,357.50

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Solution

The fourth proportional to 129,973.50, 179,363.91 and 70,357.50 is: 97,093.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,973.50 : 179,363.91 = 70,357.50 : x
  2. Step 2: Convert to fraction form
    129,973.50/179,363.91 = 70,357.50/x
  3. Step 3: Cross multiply
    129,973.50x = 179,363.91 × 70,357.50
  4. Step 4: Simplify right side
    129,973.50x = 12,619,596,297.83
  5. Step 5: Solve for x
    x = 12,619,596,297.83/129,973.50
  6. Step 6: Final answer
    x = 97,093.61

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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.