Home / 315,271.40-472,907.10-128,186.60

Finding the Fourth Proportional to 315,271.40, 472,907.10 and 128,186.60

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Solution

The fourth proportional to 315,271.40, 472,907.10 and 128,186.60 is: 192,279.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,271.40 : 472,907.10 = 128,186.60 : x
  2. Step 2: Convert to fraction form
    315,271.40/472,907.10 = 128,186.60/x
  3. Step 3: Cross multiply
    315,271.40x = 472,907.10 × 128,186.60
  4. Step 4: Simplify right side
    315,271.40x = 60,620,353,264.86
  5. Step 5: Solve for x
    x = 60,620,353,264.86/315,271.40
  6. Step 6: Final answer
    x = 192,279.90

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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.