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Finding the Fourth Proportional to 86,669.80, 130,004.70 and 70,923.40

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Solution

The fourth proportional to 86,669.80, 130,004.70 and 70,923.40 is: 106,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,669.80 : 130,004.70 = 70,923.40 : x
  2. Step 2: Convert to fraction form
    86,669.80/130,004.70 = 70,923.40/x
  3. Step 3: Cross multiply
    86,669.80x = 130,004.70 × 70,923.40
  4. Step 4: Simplify right side
    86,669.80x = 9,220,375,339.98
  5. Step 5: Solve for x
    x = 9,220,375,339.98/86,669.80
  6. Step 6: Final answer
    x = 106,385.10

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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.