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Finding the Fourth Proportional to 70,415.60, 105,623.40 and 28,892.40

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Solution

The fourth proportional to 70,415.60, 105,623.40 and 28,892.40 is: 43,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,415.60 : 105,623.40 = 28,892.40 : x
  2. Step 2: Convert to fraction form
    70,415.60/105,623.40 = 28,892.40/x
  3. Step 3: Cross multiply
    70,415.60x = 105,623.40 × 28,892.40
  4. Step 4: Simplify right side
    70,415.60x = 3,051,713,522.16
  5. Step 5: Solve for x
    x = 3,051,713,522.16/70,415.60
  6. Step 6: Final answer
    x = 43,338.60

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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.