Finding the Fourth Proportional to 72,725,962.68, 100,363,948.14 and 39,688,339.86
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Solution
The fourth proportional to 72,725,962.68, 100,363,948.14 and 39,688,339.86 is: 54,771,065.75
Step by Step Solution
- Step 1: Write the proportion equation
72,725,962.68 : 100,363,948.14 = 39,688,339.86 : x - Step 2: Convert to fraction form
72,725,962.68/100,363,948.14 = 39,688,339.86/x - Step 3: Cross multiply
72,725,962.68x = 100,363,948.14 × 39,688,339.86 - Step 4: Simplify right side
72,725,962.68x = 3,983,278,483,471,735 - Step 5: Solve for x
x = 3,983,278,483,471,735/72,725,962.68 - Step 6: Final answer
x = 54,771,065.75
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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.