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Finding the Fourth Proportional to 143,987.67, 216,030.11 and 90,719.64

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Solution

The fourth proportional to 143,987.67, 216,030.11 and 90,719.64 is: 136,110.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,987.67 : 216,030.11 = 90,719.64 : x
  2. Step 2: Convert to fraction form
    143,987.67/216,030.11 = 90,719.64/x
  3. Step 3: Cross multiply
    143,987.67x = 216,030.11 × 90,719.64
  4. Step 4: Simplify right side
    143,987.67x = 19,598,173,354.76
  5. Step 5: Solve for x
    x = 19,598,173,354.76/143,987.67
  6. Step 6: Final answer
    x = 136,110.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.