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Finding the Fourth Proportional to 130,008.30, 194,623.65 and 77,390.70

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Solution

The fourth proportional to 130,008.30, 194,623.65 and 77,390.70 is: 115,854.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,008.30 : 194,623.65 = 77,390.70 : x
  2. Step 2: Convert to fraction form
    130,008.30/194,623.65 = 77,390.70/x
  3. Step 3: Cross multiply
    130,008.30x = 194,623.65 × 77,390.70
  4. Step 4: Simplify right side
    130,008.30x = 15,062,060,510.06
  5. Step 5: Solve for x
    x = 15,062,060,510.06/130,008.30
  6. Step 6: Final answer
    x = 115,854.61

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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.