Home / 420,692,431.80-631,071,221.04-140,574,314.82

Finding the Fourth Proportional to 420,692,431.80, 631,071,221.04 and 140,574,314.82

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Solution

The fourth proportional to 420,692,431.80, 631,071,221.04 and 140,574,314.82 is: 210,872,356.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,692,431.80 : 631,071,221.04 = 140,574,314.82 : x
  2. Step 2: Convert to fraction form
    420,692,431.80/631,071,221.04 = 140,574,314.82/x
  3. Step 3: Cross multiply
    420,692,431.80x = 631,071,221.04 × 140,574,314.82
  4. Step 4: Simplify right side
    420,692,431.80x = 88,712,404,500,318,752
  5. Step 5: Solve for x
    x = 88,712,404,500,318,752/420,692,431.80
  6. Step 6: Final answer
    x = 210,872,356.61

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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.