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Finding the Fourth Proportional to 153,351.72, 211,582.80 and 98,880.84

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Solution

The fourth proportional to 153,351.72, 211,582.80 and 98,880.84 is: 136,428.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,351.72 : 211,582.80 = 98,880.84 : x
  2. Step 2: Convert to fraction form
    153,351.72/211,582.80 = 98,880.84/x
  3. Step 3: Cross multiply
    153,351.72x = 211,582.80 × 98,880.84
  4. Step 4: Simplify right side
    153,351.72x = 20,921,484,993.55
  5. Step 5: Solve for x
    x = 20,921,484,993.55/153,351.72
  6. Step 6: Final answer
    x = 136,428.11

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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.