Finding the Fourth Proportional to 100,746.12, 139,027.71 and 55,421.46
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Solution
The fourth proportional to 100,746.12, 139,027.71 and 55,421.46 is: 76,480.55
Step by Step Solution
- Step 1: Write the proportion equation
100,746.12 : 139,027.71 = 55,421.46 : x - Step 2: Convert to fraction form
100,746.12/139,027.71 = 55,421.46/x - Step 3: Cross multiply
100,746.12x = 139,027.71 × 55,421.46 - Step 4: Simplify right side
100,746.12x = 7,705,118,355.13 - Step 5: Solve for x
x = 7,705,118,355.13/100,746.12 - Step 6: Final answer
x = 76,480.55
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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.