Home / 212,403.55-318,559.10-70,215.23

Finding the Fourth Proportional to 212,403.55, 318,559.10 and 70,215.23

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Solution

The fourth proportional to 212,403.55, 318,559.10 and 70,215.23 is: 105,307.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,403.55 : 318,559.10 = 70,215.23 : x
  2. Step 2: Convert to fraction form
    212,403.55/318,559.10 = 70,215.23/x
  3. Step 3: Cross multiply
    212,403.55x = 318,559.10 × 70,215.23
  4. Step 4: Simplify right side
    212,403.55x = 22,367,700,475.09
  5. Step 5: Solve for x
    x = 22,367,700,475.09/212,403.55
  6. Step 6: Final answer
    x = 105,307.56

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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.