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Finding the Fourth Proportional to 228,479.16, 342,652.98 and 78,713.40

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Solution

The fourth proportional to 228,479.16, 342,652.98 and 78,713.40 is: 118,047.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,479.16 : 342,652.98 = 78,713.40 : x
  2. Step 2: Convert to fraction form
    228,479.16/342,652.98 = 78,713.40/x
  3. Step 3: Cross multiply
    228,479.16x = 342,652.98 × 78,713.40
  4. Step 4: Simplify right side
    228,479.16x = 26,971,381,075.93
  5. Step 5: Solve for x
    x = 26,971,381,075.93/228,479.16
  6. Step 6: Final answer
    x = 118,047.45

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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.