Home / 77,720,986.50-107,255,479.90-42,439,036.60

Finding the Fourth Proportional to 77,720,986.50, 107,255,479.90 and 42,439,036.60

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Solution

The fourth proportional to 77,720,986.50, 107,255,479.90 and 42,439,036.60 is: 58,566,153.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,720,986.50 : 107,255,479.90 = 42,439,036.60 : x
  2. Step 2: Convert to fraction form
    77,720,986.50/107,255,479.90 = 42,439,036.60/x
  3. Step 3: Cross multiply
    77,720,986.50x = 107,255,479.90 × 42,439,036.60
  4. Step 4: Simplify right side
    77,720,986.50x = 4,551,819,237,026,665
  5. Step 5: Solve for x
    x = 4,551,819,237,026,665/77,720,986.50
  6. Step 6: Final answer
    x = 58,566,153.65

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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.