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Finding the Fourth Proportional to 189,430.99, 261,448.63 and 112,955.01

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Solution

The fourth proportional to 189,430.99, 261,448.63 and 112,955.01 is: 155,898.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,430.99 : 261,448.63 = 112,955.01 : x
  2. Step 2: Convert to fraction form
    189,430.99/261,448.63 = 112,955.01/x
  3. Step 3: Cross multiply
    189,430.99x = 261,448.63 × 112,955.01
  4. Step 4: Simplify right side
    189,430.99x = 29,531,931,353.32
  5. Step 5: Solve for x
    x = 29,531,931,353.32/189,430.99
  6. Step 6: Final answer
    x = 155,898.10

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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.