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Finding the Fourth Proportional to 130,898.60, 196,347.90 and 121,275.80

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Solution

The fourth proportional to 130,898.60, 196,347.90 and 121,275.80 is: 181,913.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,898.60 : 196,347.90 = 121,275.80 : x
  2. Step 2: Convert to fraction form
    130,898.60/196,347.90 = 121,275.80/x
  3. Step 3: Cross multiply
    130,898.60x = 196,347.90 × 121,275.80
  4. Step 4: Simplify right side
    130,898.60x = 23,812,248,650.82
  5. Step 5: Solve for x
    x = 23,812,248,650.82/130,898.60
  6. Step 6: Final answer
    x = 181,913.70

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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.