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Finding the Fourth Proportional to 125,966, 173,630.48 and 85,117.40

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Solution

The fourth proportional to 125,966, 173,630.48 and 85,117.40 is: 117,325.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,966 : 173,630.48 = 85,117.40 : x
  2. Step 2: Convert to fraction form
    125,966/173,630.48 = 85,117.40/x
  3. Step 3: Cross multiply
    125,966x = 173,630.48 × 85,117.40
  4. Step 4: Simplify right side
    125,966x = 14,778,975,018.35
  5. Step 5: Solve for x
    x = 14,778,975,018.35/125,966
  6. Step 6: Final answer
    x = 117,325.11

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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.