Finding the Fourth Proportional to 90,753,091.40, 136,129,637.10 and 87,225,897.80
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Solution
The fourth proportional to 90,753,091.40, 136,129,637.10 and 87,225,897.80 is: 130,838,846.70
Step by Step Solution
- Step 1: Write the proportion equation
90,753,091.40 : 136,129,637.10 = 87,225,897.80 : x - Step 2: Convert to fraction form
90,753,091.40/136,129,637.10 = 87,225,897.80/x - Step 3: Cross multiply
90,753,091.40x = 136,129,637.10 × 87,225,897.80 - Step 4: Simplify right side
90,753,091.40x = 11,874,029,813,235,688 - Step 5: Solve for x
x = 11,874,029,813,235,688/90,753,091.40 - Step 6: Final answer
x = 130,838,846.70
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1.5x scale
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.