Home / 65,430.40-90,263.76-38,554.56

Finding the Fourth Proportional to 65,430.40, 90,263.76 and 38,554.56

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Solution

The fourth proportional to 65,430.40, 90,263.76 and 38,554.56 is: 53,187.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,430.40 : 90,263.76 = 38,554.56 : x
  2. Step 2: Convert to fraction form
    65,430.40/90,263.76 = 38,554.56/x
  3. Step 3: Cross multiply
    65,430.40x = 90,263.76 × 38,554.56
  4. Step 4: Simplify right side
    65,430.40x = 3,480,079,550.75
  5. Step 5: Solve for x
    x = 3,480,079,550.75/65,430.40
  6. Step 6: Final answer
    x = 53,187.50

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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.