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Finding the Fourth Proportional to 129,870.63, 194,649.21 and 63,210.87

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Solution

The fourth proportional to 129,870.63, 194,649.21 and 63,210.87 is: 94,740.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,870.63 : 194,649.21 = 63,210.87 : x
  2. Step 2: Convert to fraction form
    129,870.63/194,649.21 = 63,210.87/x
  3. Step 3: Cross multiply
    129,870.63x = 194,649.21 × 63,210.87
  4. Step 4: Simplify right side
    129,870.63x = 12,303,945,908.91
  5. Step 5: Solve for x
    x = 12,303,945,908.91/129,870.63
  6. Step 6: Final answer
    x = 94,740.02

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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.