Home / 71,702.18-98,944.94-39,870.40

Finding the Fourth Proportional to 71,702.18, 98,944.94 and 39,870.40

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Solution

The fourth proportional to 71,702.18, 98,944.94 and 39,870.40 is: 55,018.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,702.18 : 98,944.94 = 39,870.40 : x
  2. Step 2: Convert to fraction form
    71,702.18/98,944.94 = 39,870.40/x
  3. Step 3: Cross multiply
    71,702.18x = 98,944.94 × 39,870.40
  4. Step 4: Simplify right side
    71,702.18x = 3,944,974,188.09
  5. Step 5: Solve for x
    x = 3,944,974,188.09/71,702.18
  6. Step 6: Final answer
    x = 55,018.89

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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.