Home / 145,538.40-217,870.20-86,343.60

Finding the Fourth Proportional to 145,538.40, 217,870.20 and 86,343.60

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Solution

The fourth proportional to 145,538.40, 217,870.20 and 86,343.60 is: 129,255.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,538.40 : 217,870.20 = 86,343.60 : x
  2. Step 2: Convert to fraction form
    145,538.40/217,870.20 = 86,343.60/x
  3. Step 3: Cross multiply
    145,538.40x = 217,870.20 × 86,343.60
  4. Step 4: Simplify right side
    145,538.40x = 18,811,697,400.72
  5. Step 5: Solve for x
    x = 18,811,697,400.72/145,538.40
  6. Step 6: Final answer
    x = 129,255.90

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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.