Home / 100,778,421.28-139,065,349.62-56,121,019.60

Finding the Fourth Proportional to 100,778,421.28, 139,065,349.62 and 56,121,019.60

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Solution

The fourth proportional to 100,778,421.28, 139,065,349.62 and 56,121,019.60 is: 77,442,066.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,778,421.28 : 139,065,349.62 = 56,121,019.60 : x
  2. Step 2: Convert to fraction form
    100,778,421.28/139,065,349.62 = 56,121,019.60/x
  3. Step 3: Cross multiply
    100,778,421.28x = 139,065,349.62 × 56,121,019.60
  4. Step 4: Simplify right side
    100,778,421.28x = 7,804,489,211,704,873
  5. Step 5: Solve for x
    x = 7,804,489,211,704,873/100,778,421.28
  6. Step 6: Final answer
    x = 77,442,066.59

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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.