Home / 287,636.20-431,454.30-130,172.20

Finding the Fourth Proportional to 287,636.20, 431,454.30 and 130,172.20

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Solution

The fourth proportional to 287,636.20, 431,454.30 and 130,172.20 is: 195,258.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,636.20 : 431,454.30 = 130,172.20 : x
  2. Step 2: Convert to fraction form
    287,636.20/431,454.30 = 130,172.20/x
  3. Step 3: Cross multiply
    287,636.20x = 431,454.30 × 130,172.20
  4. Step 4: Simplify right side
    287,636.20x = 56,163,355,430.46
  5. Step 5: Solve for x
    x = 56,163,355,430.46/287,636.20
  6. Step 6: Final answer
    x = 195,258.30

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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.