Home / 65,400.21-90,254.52-38,565.72

Finding the Fourth Proportional to 65,400.21, 90,254.52 and 38,565.72

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Solution

The fourth proportional to 65,400.21, 90,254.52 and 38,565.72 is: 53,222.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,400.21 : 90,254.52 = 38,565.72 : x
  2. Step 2: Convert to fraction form
    65,400.21/90,254.52 = 38,565.72/x
  3. Step 3: Cross multiply
    65,400.21x = 90,254.52 × 38,565.72
  4. Step 4: Simplify right side
    65,400.21x = 3,480,730,547.05
  5. Step 5: Solve for x
    x = 3,480,730,547.05/65,400.21
  6. Step 6: Final answer
    x = 53,222.01

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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.