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Finding the Fourth Proportional to 78,510.68, 108,349.16 and 42,699.96

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Solution

The fourth proportional to 78,510.68, 108,349.16 and 42,699.96 is: 58,928.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,510.68 : 108,349.16 = 42,699.96 : x
  2. Step 2: Convert to fraction form
    78,510.68/108,349.16 = 42,699.96/x
  3. Step 3: Cross multiply
    78,510.68x = 108,349.16 × 42,699.96
  4. Step 4: Simplify right side
    78,510.68x = 4,626,504,584.53
  5. Step 5: Solve for x
    x = 4,626,504,584.53/78,510.68
  6. Step 6: Final answer
    x = 58,928.35

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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.