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Finding the Fourth Proportional to 78,880.71, 108,854.94 and 43,070.46

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Solution

The fourth proportional to 78,880.71, 108,854.94 and 43,070.46 is: 59,437.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880.71 : 108,854.94 = 43,070.46 : x
  2. Step 2: Convert to fraction form
    78,880.71/108,854.94 = 43,070.46/x
  3. Step 3: Cross multiply
    78,880.71x = 108,854.94 × 43,070.46
  4. Step 4: Simplify right side
    78,880.71x = 4,688,432,446.75
  5. Step 5: Solve for x
    x = 4,688,432,446.75/78,880.71
  6. Step 6: Final answer
    x = 59,437.00

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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.