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Finding the Fourth Proportional to 128,075.46, 176,754.70 and 70,720.48

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Solution

The fourth proportional to 128,075.46, 176,754.70 and 70,720.48 is: 97,600.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,075.46 : 176,754.70 = 70,720.48 : x
  2. Step 2: Convert to fraction form
    128,075.46/176,754.70 = 70,720.48/x
  3. Step 3: Cross multiply
    128,075.46x = 176,754.70 × 70,720.48
  4. Step 4: Simplify right side
    128,075.46x = 12,500,176,342.48
  5. Step 5: Solve for x
    x = 12,500,176,342.48/128,075.46
  6. Step 6: Final answer
    x = 97,600.09

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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.