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Finding the Fourth Proportional to 145,864.76, 199,980.64 and 143,207.70

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Solution

The fourth proportional to 145,864.76, 199,980.64 and 143,207.70 is: 196,337.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,864.76 : 199,980.64 = 143,207.70 : x
  2. Step 2: Convert to fraction form
    145,864.76/199,980.64 = 143,207.70/x
  3. Step 3: Cross multiply
    145,864.76x = 199,980.64 × 143,207.70
  4. Step 4: Simplify right side
    145,864.76x = 28,638,767,498.93
  5. Step 5: Solve for x
    x = 28,638,767,498.93/145,864.76
  6. Step 6: Final answer
    x = 196,337.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.