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Finding the Fourth Proportional to 145,835.40, 218,801.70 and 130,157.40

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Solution

The fourth proportional to 145,835.40, 218,801.70 and 130,157.40 is: 195,279.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,835.40 : 218,801.70 = 130,157.40 : x
  2. Step 2: Convert to fraction form
    145,835.40/218,801.70 = 130,157.40/x
  3. Step 3: Cross multiply
    145,835.40x = 218,801.70 × 130,157.40
  4. Step 4: Simplify right side
    145,835.40x = 28,478,660,387.58
  5. Step 5: Solve for x
    x = 28,478,660,387.58/145,835.40
  6. Step 6: Final answer
    x = 195,279.48

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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.