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Finding the Fourth Proportional to 346,715.20, 520,072.80 and 84,059.20

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Solution

The fourth proportional to 346,715.20, 520,072.80 and 84,059.20 is: 126,088.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,715.20 : 520,072.80 = 84,059.20 : x
  2. Step 2: Convert to fraction form
    346,715.20/520,072.80 = 84,059.20/x
  3. Step 3: Cross multiply
    346,715.20x = 520,072.80 × 84,059.20
  4. Step 4: Simplify right side
    346,715.20x = 43,716,903,509.76
  5. Step 5: Solve for x
    x = 43,716,903,509.76/346,715.20
  6. Step 6: Final answer
    x = 126,088.80

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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.