Home / 421,156.45-631,438.79-147,535.72

Finding the Fourth Proportional to 421,156.45, 631,438.79 and 147,535.72

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Solution

The fourth proportional to 421,156.45, 631,438.79 and 147,535.72 is: 221,199.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,156.45 : 631,438.79 = 147,535.72 : x
  2. Step 2: Convert to fraction form
    421,156.45/631,438.79 = 147,535.72/x
  3. Step 3: Cross multiply
    421,156.45x = 631,438.79 × 147,535.72
  4. Step 4: Simplify right side
    421,156.45x = 93,159,773,361.38
  5. Step 5: Solve for x
    x = 93,159,773,361.38/421,156.45
  6. Step 6: Final answer
    x = 221,199.92

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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.