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Finding the Fourth Proportional to 125,783.90, 173,581.79 and 72,100.05

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Solution

The fourth proportional to 125,783.90, 173,581.79 and 72,100.05 is: 99,498.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,783.90 : 173,581.79 = 72,100.05 : x
  2. Step 2: Convert to fraction form
    125,783.90/173,581.79 = 72,100.05/x
  3. Step 3: Cross multiply
    125,783.90x = 173,581.79 × 72,100.05
  4. Step 4: Simplify right side
    125,783.90x = 12,515,255,377.59
  5. Step 5: Solve for x
    x = 12,515,255,377.59/125,783.90
  6. Step 6: Final answer
    x = 99,498.07

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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.