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Finding the Fourth Proportional to 65,641.32, 90,707.64 and 53,700.30

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Solution

The fourth proportional to 65,641.32, 90,707.64 and 53,700.30 is: 74,206.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,641.32 : 90,707.64 = 53,700.30 : x
  2. Step 2: Convert to fraction form
    65,641.32/90,707.64 = 53,700.30/x
  3. Step 3: Cross multiply
    65,641.32x = 90,707.64 × 53,700.30
  4. Step 4: Simplify right side
    65,641.32x = 4,871,027,480.29
  5. Step 5: Solve for x
    x = 4,871,027,480.29/65,641.32
  6. Step 6: Final answer
    x = 74,206.73

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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.