Home / 142,015.40-212,942.10-53,271.80

Finding the Fourth Proportional to 142,015.40, 212,942.10 and 53,271.80

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Solution

The fourth proportional to 142,015.40, 212,942.10 and 53,271.80 is: 79,877.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,015.40 : 212,942.10 = 53,271.80 : x
  2. Step 2: Convert to fraction form
    142,015.40/212,942.10 = 53,271.80/x
  3. Step 3: Cross multiply
    142,015.40x = 212,942.10 × 53,271.80
  4. Step 4: Simplify right side
    142,015.40x = 11,343,808,962.78
  5. Step 5: Solve for x
    x = 11,343,808,962.78/142,015.40
  6. Step 6: Final answer
    x = 79,877.32

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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.