Home / 87,720.15-121,054.53-48,430.40

Finding the Fourth Proportional to 87,720.15, 121,054.53 and 48,430.40

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Solution

The fourth proportional to 87,720.15, 121,054.53 and 48,430.40 is: 66,834.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,720.15 : 121,054.53 = 48,430.40 : x
  2. Step 2: Convert to fraction form
    87,720.15/121,054.53 = 48,430.40/x
  3. Step 3: Cross multiply
    87,720.15x = 121,054.53 × 48,430.40
  4. Step 4: Simplify right side
    87,720.15x = 5,862,719,113.03
  5. Step 5: Solve for x
    x = 5,862,719,113.03/87,720.15
  6. Step 6: Final answer
    x = 66,834.35

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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.