Finding the Fourth Proportional to 38,689,106.16, 53,390,964.74 and 21,285,078.02
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Solution
The fourth proportional to 38,689,106.16, 53,390,964.74 and 21,285,078.02 is: 29,373,406.69
Step by Step Solution
- Step 1: Write the proportion equation
38,689,106.16 : 53,390,964.74 = 21,285,078.02 : x - Step 2: Convert to fraction form
38,689,106.16/53,390,964.74 = 21,285,078.02/x - Step 3: Cross multiply
38,689,106.16x = 53,390,964.74 × 21,285,078.02 - Step 4: Simplify right side
38,689,106.16x = 1,136,430,849,680,588.75 - Step 5: Solve for x
x = 1,136,430,849,680,588.75/38,689,106.16 - Step 6: Final answer
x = 29,373,406.69
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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.