Finding the Fourth Proportional to 81,768,987.98, 122,708,026.24 and 42,413,512.94
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Solution
The fourth proportional to 81,768,987.98, 122,708,026.24 and 42,413,512.94 is: 63,648,561.48
Step by Step Solution
- Step 1: Write the proportion equation
81,768,987.98 : 122,708,026.24 = 42,413,512.94 : x - Step 2: Convert to fraction form
81,768,987.98/122,708,026.24 = 42,413,512.94/x - Step 3: Cross multiply
81,768,987.98x = 122,708,026.24 × 42,413,512.94 - Step 4: Simplify right side
81,768,987.98x = 5,204,478,458,772,099 - Step 5: Solve for x
x = 5,204,478,458,772,099/81,768,987.98 - Step 6: Final answer
x = 63,648,561.48
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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.