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Finding the Fourth Proportional to 141,871.80, 212,807.70 and 139,798.20

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Solution

The fourth proportional to 141,871.80, 212,807.70 and 139,798.20 is: 209,697.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,871.80 : 212,807.70 = 139,798.20 : x
  2. Step 2: Convert to fraction form
    141,871.80/212,807.70 = 139,798.20/x
  3. Step 3: Cross multiply
    141,871.80x = 212,807.70 × 139,798.20
  4. Step 4: Simplify right side
    141,871.80x = 29,750,133,406.14
  5. Step 5: Solve for x
    x = 29,750,133,406.14/141,871.80
  6. Step 6: Final answer
    x = 209,697.30

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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.