Finding the Fourth Proportional to 85,408,909.80, 128,113,364.70 and 39,350,689.80
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Solution
The fourth proportional to 85,408,909.80, 128,113,364.70 and 39,350,689.80 is: 59,026,034.70
Step by Step Solution
- Step 1: Write the proportion equation
85,408,909.80 : 128,113,364.70 = 39,350,689.80 : x - Step 2: Convert to fraction form
85,408,909.80/128,113,364.70 = 39,350,689.80/x - Step 3: Cross multiply
85,408,909.80x = 128,113,364.70 × 39,350,689.80 - Step 4: Simplify right side
85,408,909.80x = 5,041,349,273,543,970 - Step 5: Solve for x
x = 5,041,349,273,543,970/85,408,909.80 - Step 6: Final answer
x = 59,026,034.70
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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.