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Finding the Fourth Proportional to 342,136.80, 513,205.20 and 105,458.40

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Solution

The fourth proportional to 342,136.80, 513,205.20 and 105,458.40 is: 158,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,136.80 : 513,205.20 = 105,458.40 : x
  2. Step 2: Convert to fraction form
    342,136.80/513,205.20 = 105,458.40/x
  3. Step 3: Cross multiply
    342,136.80x = 513,205.20 × 105,458.40
  4. Step 4: Simplify right side
    342,136.80x = 54,121,799,263.68
  5. Step 5: Solve for x
    x = 54,121,799,263.68/342,136.80
  6. Step 6: Final answer
    x = 158,187.60

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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.