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Finding the Fourth Proportional to 124,693.26, 172,076.90 and 70,978.28

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Solution

The fourth proportional to 124,693.26, 172,076.90 and 70,978.28 is: 97,950.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,693.26 : 172,076.90 = 70,978.28 : x
  2. Step 2: Convert to fraction form
    124,693.26/172,076.90 = 70,978.28/x
  3. Step 3: Cross multiply
    124,693.26x = 172,076.90 × 70,978.28
  4. Step 4: Simplify right side
    124,693.26x = 12,213,721,174.46
  5. Step 5: Solve for x
    x = 12,213,721,174.46/124,693.26
  6. Step 6: Final answer
    x = 97,950.13

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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.