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Finding the Fourth Proportional to 134,235.70, 201,507.15 and 78,862.90

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Solution

The fourth proportional to 134,235.70, 201,507.15 and 78,862.90 is: 118,384.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,235.70 : 201,507.15 = 78,862.90 : x
  2. Step 2: Convert to fraction form
    134,235.70/201,507.15 = 78,862.90/x
  3. Step 3: Cross multiply
    134,235.70x = 201,507.15 × 78,862.90
  4. Step 4: Simplify right side
    134,235.70x = 15,891,438,219.74
  5. Step 5: Solve for x
    x = 15,891,438,219.74/134,235.70
  6. Step 6: Final answer
    x = 118,384.59

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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.