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Finding the Fourth Proportional to 210,762.60, 315,487.80 and 121,751.70

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Solution

The fourth proportional to 210,762.60, 315,487.80 and 121,751.70 is: 182,248.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,762.60 : 315,487.80 = 121,751.70 : x
  2. Step 2: Convert to fraction form
    210,762.60/315,487.80 = 121,751.70/x
  3. Step 3: Cross multiply
    210,762.60x = 315,487.80 × 121,751.70
  4. Step 4: Simplify right side
    210,762.60x = 38,411,175,979.26
  5. Step 5: Solve for x
    x = 38,411,175,979.26/210,762.60
  6. Step 6: Final answer
    x = 182,248.54

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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.