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Finding the Fourth Proportional to 85,663.68, 128,534.40 and 50,671.68

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Solution

The fourth proportional to 85,663.68, 128,534.40 and 50,671.68 is: 76,030.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,663.68 : 128,534.40 = 50,671.68 : x
  2. Step 2: Convert to fraction form
    85,663.68/128,534.40 = 50,671.68/x
  3. Step 3: Cross multiply
    85,663.68x = 128,534.40 × 50,671.68
  4. Step 4: Simplify right side
    85,663.68x = 6,513,053,985.79
  5. Step 5: Solve for x
    x = 6,513,053,985.79/85,663.68
  6. Step 6: Final answer
    x = 76,030.52

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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.