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Finding the Fourth Proportional to 78,248.39, 107,972.87 and 46,411.07

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Solution

The fourth proportional to 78,248.39, 107,972.87 and 46,411.07 is: 64,041.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,248.39 : 107,972.87 = 46,411.07 : x
  2. Step 2: Convert to fraction form
    78,248.39/107,972.87 = 46,411.07/x
  3. Step 3: Cross multiply
    78,248.39x = 107,972.87 × 46,411.07
  4. Step 4: Simplify right side
    78,248.39x = 5,011,136,427.67
  5. Step 5: Solve for x
    x = 5,011,136,427.67/78,248.39
  6. Step 6: Final answer
    x = 64,041.40

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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.