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Finding the Fourth Proportional to 128,483.84, 177,299.20 and 71,895.04

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Solution

The fourth proportional to 128,483.84, 177,299.20 and 71,895.04 is: 99,210.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,483.84 : 177,299.20 = 71,895.04 : x
  2. Step 2: Convert to fraction form
    128,483.84/177,299.20 = 71,895.04/x
  3. Step 3: Cross multiply
    128,483.84x = 177,299.20 × 71,895.04
  4. Step 4: Simplify right side
    128,483.84x = 12,746,933,075.97
  5. Step 5: Solve for x
    x = 12,746,933,075.97/128,483.84
  6. Step 6: Final answer
    x = 99,210.40

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1.5x scale

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.