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Finding the Fourth Proportional to 125,703.42, 173,300.94 and 85,347.12

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Solution

The fourth proportional to 125,703.42, 173,300.94 and 85,347.12 is: 117,663.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,703.42 : 173,300.94 = 85,347.12 : x
  2. Step 2: Convert to fraction form
    125,703.42/173,300.94 = 85,347.12/x
  3. Step 3: Cross multiply
    125,703.42x = 173,300.94 × 85,347.12
  4. Step 4: Simplify right side
    125,703.42x = 14,790,736,122.29
  5. Step 5: Solve for x
    x = 14,790,736,122.29/125,703.42
  6. Step 6: Final answer
    x = 117,663.75

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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.