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Finding the Fourth Proportional to 79,292.40, 109,428.58 and 52,387.72

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Solution

The fourth proportional to 79,292.40, 109,428.58 and 52,387.72 is: 72,298.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,292.40 : 109,428.58 = 52,387.72 : x
  2. Step 2: Convert to fraction form
    79,292.40/109,428.58 = 52,387.72/x
  3. Step 3: Cross multiply
    79,292.40x = 109,428.58 × 52,387.72
  4. Step 4: Simplify right side
    79,292.40x = 5,732,713,809.04
  5. Step 5: Solve for x
    x = 5,732,713,809.04/79,292.40
  6. Step 6: Final answer
    x = 72,298.40

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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.