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Finding the Fourth Proportional to 154,684.48, 213,482.24 and 86,719.76

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Solution

The fourth proportional to 154,684.48, 213,482.24 and 86,719.76 is: 119,683.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,684.48 : 213,482.24 = 86,719.76 : x
  2. Step 2: Convert to fraction form
    154,684.48/213,482.24 = 86,719.76/x
  3. Step 3: Cross multiply
    154,684.48x = 213,482.24 × 86,719.76
  4. Step 4: Simplify right side
    154,684.48x = 18,513,128,617.06
  5. Step 5: Solve for x
    x = 18,513,128,617.06/154,684.48
  6. Step 6: Final answer
    x = 119,683.17

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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.