Home / 105,075.17-145,057.25-81,148.13

Finding the Fourth Proportional to 105,075.17, 145,057.25 and 81,148.13

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Solution

The fourth proportional to 105,075.17, 145,057.25 and 81,148.13 is: 112,025.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,075.17 : 145,057.25 = 81,148.13 : x
  2. Step 2: Convert to fraction form
    105,075.17/145,057.25 = 81,148.13/x
  3. Step 3: Cross multiply
    105,075.17x = 145,057.25 × 81,148.13
  4. Step 4: Simplify right side
    105,075.17x = 11,771,124,174.70
  5. Step 5: Solve for x
    x = 11,771,124,174.70/105,075.17
  6. Step 6: Final answer
    x = 112,025.74

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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.