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Finding the Fourth Proportional to 60,718.60, 91,077.90 and 21,271.60

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Solution

The fourth proportional to 60,718.60, 91,077.90 and 21,271.60 is: 31,907.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,718.60 : 91,077.90 = 21,271.60 : x
  2. Step 2: Convert to fraction form
    60,718.60/91,077.90 = 21,271.60/x
  3. Step 3: Cross multiply
    60,718.60x = 91,077.90 × 21,271.60
  4. Step 4: Simplify right side
    60,718.60x = 1,937,372,657.64
  5. Step 5: Solve for x
    x = 1,937,372,657.64/60,718.60
  6. Step 6: Final answer
    x = 31,907.40

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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.