Home / 76,831.80-115,320.60-47,307.30

Finding the Fourth Proportional to 76,831.80, 115,320.60 and 47,307.30

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Solution

The fourth proportional to 76,831.80, 115,320.60 and 47,307.30 is: 71,005.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,831.80 : 115,320.60 = 47,307.30 : x
  2. Step 2: Convert to fraction form
    76,831.80/115,320.60 = 47,307.30/x
  3. Step 3: Cross multiply
    76,831.80x = 115,320.60 × 47,307.30
  4. Step 4: Simplify right side
    76,831.80x = 5,455,506,220.38
  5. Step 5: Solve for x
    x = 5,455,506,220.38/76,831.80
  6. Step 6: Final answer
    x = 71,005.84

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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.