Finding the Fourth Proportional to 100,923.84, 139,281.12 and 56,211.84
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Solution
The fourth proportional to 100,923.84, 139,281.12 and 56,211.84 is: 77,575.80
Step by Step Solution
- Step 1: Write the proportion equation
100,923.84 : 139,281.12 = 56,211.84 : x - Step 2: Convert to fraction form
100,923.84/139,281.12 = 56,211.84/x - Step 3: Cross multiply
100,923.84x = 139,281.12 × 56,211.84 - Step 4: Simplify right side
100,923.84x = 7,829,248,032.46 - Step 5: Solve for x
x = 7,829,248,032.46/100,923.84 - Step 6: Final answer
x = 77,575.80
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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.