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Finding the Fourth Proportional to 151,214.80, 208,699.32 and 90,818.64

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Solution

The fourth proportional to 151,214.80, 208,699.32 and 90,818.64 is: 125,343.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,214.80 : 208,699.32 = 90,818.64 : x
  2. Step 2: Convert to fraction form
    151,214.80/208,699.32 = 90,818.64/x
  3. Step 3: Cross multiply
    151,214.80x = 208,699.32 × 90,818.64
  4. Step 4: Simplify right side
    151,214.80x = 18,953,788,411.32
  5. Step 5: Solve for x
    x = 18,953,788,411.32/151,214.80
  6. Step 6: Final answer
    x = 125,343.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.