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Finding the Fourth Proportional to 51,355.16, 70,869.63 and 28,698.06

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Solution

The fourth proportional to 51,355.16, 70,869.63 and 28,698.06 is: 39,603.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,355.16 : 70,869.63 = 28,698.06 : x
  2. Step 2: Convert to fraction form
    51,355.16/70,869.63 = 28,698.06/x
  3. Step 3: Cross multiply
    51,355.16x = 70,869.63 × 28,698.06
  4. Step 4: Simplify right side
    51,355.16x = 2,033,820,893.92
  5. Step 5: Solve for x
    x = 2,033,820,893.92/51,355.16
  6. Step 6: Final answer
    x = 39,603.05

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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.