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Finding the Fourth Proportional to 125,678.12, 173,435.84 and 71,980.96

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Solution

The fourth proportional to 125,678.12, 173,435.84 and 71,980.96 is: 99,333.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,678.12 : 173,435.84 = 71,980.96 : x
  2. Step 2: Convert to fraction form
    125,678.12/173,435.84 = 71,980.96/x
  3. Step 3: Cross multiply
    125,678.12x = 173,435.84 × 71,980.96
  4. Step 4: Simplify right side
    125,678.12x = 12,484,078,261.61
  5. Step 5: Solve for x
    x = 12,484,078,261.61/125,678.12
  6. Step 6: Final answer
    x = 99,333.74

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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.