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Finding the Fourth Proportional to 46,859.76, 70,239.60 and 21,870.72

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Solution

The fourth proportional to 46,859.76, 70,239.60 and 21,870.72 is: 32,782.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,859.76 : 70,239.60 = 21,870.72 : x
  2. Step 2: Convert to fraction form
    46,859.76/70,239.60 = 21,870.72/x
  3. Step 3: Cross multiply
    46,859.76x = 70,239.60 × 21,870.72
  4. Step 4: Simplify right side
    46,859.76x = 1,536,190,624.51
  5. Step 5: Solve for x
    x = 1,536,190,624.51/46,859.76
  6. Step 6: Final answer
    x = 32,782.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.