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Finding the Fourth Proportional to 130,407.51, 179,898.78 and 85,064.91

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Solution

The fourth proportional to 130,407.51, 179,898.78 and 85,064.91 is: 117,348.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,407.51 : 179,898.78 = 85,064.91 : x
  2. Step 2: Convert to fraction form
    130,407.51/179,898.78 = 85,064.91/x
  3. Step 3: Cross multiply
    130,407.51x = 179,898.78 × 85,064.91
  4. Step 4: Simplify right side
    130,407.51x = 15,303,073,529.81
  5. Step 5: Solve for x
    x = 15,303,073,529.81/130,407.51
  6. Step 6: Final answer
    x = 117,348.10

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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.