Home / 77,940.90-107,558.10-42,130.98

Finding the Fourth Proportional to 77,940.90, 107,558.10 and 42,130.98

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Solution

The fourth proportional to 77,940.90, 107,558.10 and 42,130.98 is: 58,140.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,940.90 : 107,558.10 = 42,130.98 : x
  2. Step 2: Convert to fraction form
    77,940.90/107,558.10 = 42,130.98/x
  3. Step 3: Cross multiply
    77,940.90x = 107,558.10 × 42,130.98
  4. Step 4: Simplify right side
    77,940.90x = 4,531,528,159.94
  5. Step 5: Solve for x
    x = 4,531,528,159.94/77,940.90
  6. Step 6: Final answer
    x = 58,140.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.