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Finding the Fourth Proportional to 78,152.40, 109,724.40 and 78,152.40

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Solution

The fourth proportional to 78,152.40, 109,724.40 and 78,152.40 is: 109,724.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,152.40 : 109,724.40 = 78,152.40 : x
  2. Step 2: Convert to fraction form
    78,152.40/109,724.40 = 78,152.40/x
  3. Step 3: Cross multiply
    78,152.40x = 109,724.40 × 78,152.40
  4. Step 4: Simplify right side
    78,152.40x = 8,575,225,198.56
  5. Step 5: Solve for x
    x = 8,575,225,198.56/78,152.40
  6. Step 6: Final answer
    x = 109,724.40

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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.