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Finding the Fourth Proportional to 115,720.18, 159,686.32 and 64,724.08

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Solution

The fourth proportional to 115,720.18, 159,686.32 and 64,724.08 is: 89,315.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,720.18 : 159,686.32 = 64,724.08 : x
  2. Step 2: Convert to fraction form
    115,720.18/159,686.32 = 64,724.08/x
  3. Step 3: Cross multiply
    115,720.18x = 159,686.32 × 64,724.08
  4. Step 4: Simplify right side
    115,720.18x = 10,335,549,028.53
  5. Step 5: Solve for x
    x = 10,335,549,028.53/115,720.18
  6. Step 6: Final answer
    x = 89,315.01

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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.