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Finding the Fourth Proportional to 124,515, 171,830.70 and 79,803

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Solution

The fourth proportional to 124,515, 171,830.70 and 79,803 is: 110,128.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,515 : 171,830.70 = 79,803 : x
  2. Step 2: Convert to fraction form
    124,515/171,830.70 = 79,803/x
  3. Step 3: Cross multiply
    124,515x = 171,830.70 × 79,803
  4. Step 4: Simplify right side
    124,515x = 13,712,605,352.10
  5. Step 5: Solve for x
    x = 13,712,605,352.10/124,515
  6. Step 6: Final answer
    x = 110,128.14

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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.