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Finding the Fourth Proportional to 210,455.60, 315,681.24 and 121,652.60

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Solution

The fourth proportional to 210,455.60, 315,681.24 and 121,652.60 is: 182,477.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,455.60 : 315,681.24 = 121,652.60 : x
  2. Step 2: Convert to fraction form
    210,455.60/315,681.24 = 121,652.60/x
  3. Step 3: Cross multiply
    210,455.60x = 315,681.24 × 121,652.60
  4. Step 4: Simplify right side
    210,455.60x = 38,403,443,617.22
  5. Step 5: Solve for x
    x = 38,403,443,617.22/210,455.60
  6. Step 6: Final answer
    x = 182,477.65

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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.