Home / 78,266,777.80-117,400,166.70-49,167,430.60

Finding the Fourth Proportional to 78,266,777.80, 117,400,166.70 and 49,167,430.60

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Solution

The fourth proportional to 78,266,777.80, 117,400,166.70 and 49,167,430.60 is: 73,751,145.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,266,777.80 : 117,400,166.70 = 49,167,430.60 : x
  2. Step 2: Convert to fraction form
    78,266,777.80/117,400,166.70 = 49,167,430.60/x
  3. Step 3: Cross multiply
    78,266,777.80x = 117,400,166.70 × 49,167,430.60
  4. Step 4: Simplify right side
    78,266,777.80x = 5,772,264,548,650,681
  5. Step 5: Solve for x
    x = 5,772,264,548,650,681/78,266,777.80
  6. Step 6: Final answer
    x = 73,751,145.90

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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.