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Finding the Fourth Proportional to 75,437.92, 104,132.40 and 64,784.80

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Solution

The fourth proportional to 75,437.92, 104,132.40 and 64,784.80 is: 89,427.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,437.92 : 104,132.40 = 64,784.80 : x
  2. Step 2: Convert to fraction form
    75,437.92/104,132.40 = 64,784.80/x
  3. Step 3: Cross multiply
    75,437.92x = 104,132.40 × 64,784.80
  4. Step 4: Simplify right side
    75,437.92x = 6,746,196,707.52
  5. Step 5: Solve for x
    x = 6,746,196,707.52/75,437.92
  6. Step 6: Final answer
    x = 89,427.13

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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.