Finding the Fourth Proportional to 138,574,430.40, 207,637,696.80 and 87,364,804.80
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Solution
The fourth proportional to 138,574,430.40, 207,637,696.80 and 87,364,804.80 is: 130,906,017.78
Step by Step Solution
- Step 1: Write the proportion equation
138,574,430.40 : 207,637,696.80 = 87,364,804.80 : x - Step 2: Convert to fraction form
138,574,430.40/207,637,696.80 = 87,364,804.80/x - Step 3: Cross multiply
138,574,430.40x = 207,637,696.80 × 87,364,804.80 - Step 4: Simplify right side
138,574,430.40x = 18,140,226,850,053,584 - Step 5: Solve for x
x = 18,140,226,850,053,584/138,574,430.40 - Step 6: Final answer
x = 130,906,017.78
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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.