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Finding the Fourth Proportional to 153,320.40, 211,581.84 and 86,252.40

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Solution

The fourth proportional to 153,320.40, 211,581.84 and 86,252.40 is: 119,028.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,320.40 : 211,581.84 = 86,252.40 : x
  2. Step 2: Convert to fraction form
    153,320.40/211,581.84 = 86,252.40/x
  3. Step 3: Cross multiply
    153,320.40x = 211,581.84 × 86,252.40
  4. Step 4: Simplify right side
    153,320.40x = 18,249,441,496.42
  5. Step 5: Solve for x
    x = 18,249,441,496.42/153,320.40
  6. Step 6: Final answer
    x = 119,028.14

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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.