Finding the Fourth Proportional to 85,887,339.70, 128,831,009.55 and 51,875,115.70
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Solution
The fourth proportional to 85,887,339.70, 128,831,009.55 and 51,875,115.70 is: 77,812,673.55
Step by Step Solution
- Step 1: Write the proportion equation
85,887,339.70 : 128,831,009.55 = 51,875,115.70 : x - Step 2: Convert to fraction form
85,887,339.70/128,831,009.55 = 51,875,115.70/x - Step 3: Cross multiply
85,887,339.70x = 128,831,009.55 × 51,875,115.70 - Step 4: Simplify right side
85,887,339.70x = 6,683,123,526,154,055 - Step 5: Solve for x
x = 6,683,123,526,154,055/85,887,339.70 - Step 6: Final answer
x = 77,812,673.55
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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.