Finding the Fourth Proportional to 261,621,371.76, 392,489,519.16 and 77,374,483.53
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Solution
The fourth proportional to 261,621,371.76, 392,489,519.16 and 77,374,483.53 is: 116,078,719.53
Step by Step Solution
- Step 1: Write the proportion equation
261,621,371.76 : 392,489,519.16 = 77,374,483.53 : x - Step 2: Convert to fraction form
261,621,371.76/392,489,519.16 = 77,374,483.53/x - Step 3: Cross multiply
261,621,371.76x = 392,489,519.16 × 77,374,483.53 - Step 4: Simplify right side
261,621,371.76x = 30,368,673,835,943,040 - Step 5: Solve for x
x = 30,368,673,835,943,040/261,621,371.76 - Step 6: Final answer
x = 116,078,719.53
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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.