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Finding the Fourth Proportional to 56,989.60, 79,960.40 and 56,989.60

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Solution

The fourth proportional to 56,989.60, 79,960.40 and 56,989.60 is: 79,960.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,989.60 : 79,960.40 = 56,989.60 : x
  2. Step 2: Convert to fraction form
    56,989.60/79,960.40 = 56,989.60/x
  3. Step 3: Cross multiply
    56,989.60x = 79,960.40 × 56,989.60
  4. Step 4: Simplify right side
    56,989.60x = 4,556,911,211.84
  5. Step 5: Solve for x
    x = 4,556,911,211.84/56,989.60
  6. Step 6: Final answer
    x = 79,960.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.