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Finding the Fourth Proportional to 79,431.60, 109,618.16 and 45,897.60

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Solution

The fourth proportional to 79,431.60, 109,618.16 and 45,897.60 is: 63,340.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,431.60 : 109,618.16 = 45,897.60 : x
  2. Step 2: Convert to fraction form
    79,431.60/109,618.16 = 45,897.60/x
  3. Step 3: Cross multiply
    79,431.60x = 109,618.16 × 45,897.60
  4. Step 4: Simplify right side
    79,431.60x = 5,031,210,460.42
  5. Step 5: Solve for x
    x = 5,031,210,460.42/79,431.60
  6. Step 6: Final answer
    x = 63,340.16

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1.5x scale

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.