Home / 65,900.28-90,938.64-39,045.36

Finding the Fourth Proportional to 65,900.28, 90,938.64 and 39,045.36

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Solution

The fourth proportional to 65,900.28, 90,938.64 and 39,045.36 is: 53,880.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,900.28 : 90,938.64 = 39,045.36 : x
  2. Step 2: Convert to fraction form
    65,900.28/90,938.64 = 39,045.36/x
  3. Step 3: Cross multiply
    65,900.28x = 90,938.64 × 39,045.36
  4. Step 4: Simplify right side
    65,900.28x = 3,550,731,936.71
  5. Step 5: Solve for x
    x = 3,550,731,936.71/65,900.28
  6. Step 6: Final answer
    x = 53,880.38

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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.