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Finding the Fourth Proportional to 108,698.63, 149,953.07 and 76,885.07

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Solution

The fourth proportional to 108,698.63, 149,953.07 and 76,885.07 is: 106,065.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,698.63 : 149,953.07 = 76,885.07 : x
  2. Step 2: Convert to fraction form
    108,698.63/149,953.07 = 76,885.07/x
  3. Step 3: Cross multiply
    108,698.63x = 149,953.07 × 76,885.07
  4. Step 4: Simplify right side
    108,698.63x = 11,529,151,726.11
  5. Step 5: Solve for x
    x = 11,529,151,726.11/108,698.63
  6. Step 6: Final answer
    x = 106,065.29

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1.5x scale

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.