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Finding the Fourth Proportional to 64,985.60, 97,478.40 and 28,049.60

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Solution

The fourth proportional to 64,985.60, 97,478.40 and 28,049.60 is: 42,074.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,985.60 : 97,478.40 = 28,049.60 : x
  2. Step 2: Convert to fraction form
    64,985.60/97,478.40 = 28,049.60/x
  3. Step 3: Cross multiply
    64,985.60x = 97,478.40 × 28,049.60
  4. Step 4: Simplify right side
    64,985.60x = 2,734,230,128.64
  5. Step 5: Solve for x
    x = 2,734,230,128.64/64,985.60
  6. Step 6: Final answer
    x = 42,074.40

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1.5x scale

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.