Home / 101,411.28-139,865.40-77,500.08

Finding the Fourth Proportional to 101,411.28, 139,865.40 and 77,500.08

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Solution

The fourth proportional to 101,411.28, 139,865.40 and 77,500.08 is: 106,887.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,411.28 : 139,865.40 = 77,500.08 : x
  2. Step 2: Convert to fraction form
    101,411.28/139,865.40 = 77,500.08/x
  3. Step 3: Cross multiply
    101,411.28x = 139,865.40 × 77,500.08
  4. Step 4: Simplify right side
    101,411.28x = 10,839,579,689.23
  5. Step 5: Solve for x
    x = 10,839,579,689.23/101,411.28
  6. Step 6: Final answer
    x = 106,887.32

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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.