Finding the Fourth Proportional to 80,930,281.80, 121,395,422.70 and 72,427,225.80
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Solution
The fourth proportional to 80,930,281.80, 121,395,422.70 and 72,427,225.80 is: 108,640,838.70
Step by Step Solution
- Step 1: Write the proportion equation
80,930,281.80 : 121,395,422.70 = 72,427,225.80 : x - Step 2: Convert to fraction form
80,930,281.80/121,395,422.70 = 72,427,225.80/x - Step 3: Cross multiply
80,930,281.80x = 121,395,422.70 × 72,427,225.80 - Step 4: Simplify right side
80,930,281.80x = 8,792,333,690,979,346 - Step 5: Solve for x
x = 8,792,333,690,979,346/80,930,281.80 - Step 6: Final answer
x = 108,640,838.70
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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.