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Finding the Fourth Proportional to 174,428, 261,628.56 and 99,312.32

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Solution

The fourth proportional to 174,428, 261,628.56 and 99,312.32 is: 148,960.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,428 : 261,628.56 = 99,312.32 : x
  2. Step 2: Convert to fraction form
    174,428/261,628.56 = 99,312.32/x
  3. Step 3: Cross multiply
    174,428x = 261,628.56 × 99,312.32
  4. Step 4: Simplify right side
    174,428x = 25,982,939,271.86
  5. Step 5: Solve for x
    x = 25,982,939,271.86/174,428
  6. Step 6: Final answer
    x = 148,960.83

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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.