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Finding the Fourth Proportional to 212,580.57, 318,915.83 and 70,417.79

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Solution

The fourth proportional to 212,580.57, 318,915.83 and 70,417.79 is: 105,641.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,580.57 : 318,915.83 = 70,417.79 : x
  2. Step 2: Convert to fraction form
    212,580.57/318,915.83 = 70,417.79/x
  3. Step 3: Cross multiply
    212,580.57x = 318,915.83 × 70,417.79
  4. Step 4: Simplify right side
    212,580.57x = 22,457,347,944.62
  5. Step 5: Solve for x
    x = 22,457,347,944.62/212,580.57
  6. Step 6: Final answer
    x = 105,641.58

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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.