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Finding the Fourth Proportional to 53,287.40, 79,931.10 and 25,639.40

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Solution

The fourth proportional to 53,287.40, 79,931.10 and 25,639.40 is: 38,459.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,287.40 : 79,931.10 = 25,639.40 : x
  2. Step 2: Convert to fraction form
    53,287.40/79,931.10 = 25,639.40/x
  3. Step 3: Cross multiply
    53,287.40x = 79,931.10 × 25,639.40
  4. Step 4: Simplify right side
    53,287.40x = 2,049,385,445.34
  5. Step 5: Solve for x
    x = 2,049,385,445.34/53,287.40
  6. Step 6: Final answer
    x = 38,459.10

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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.