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Finding the Fourth Proportional to 118,510.40, 177,880.80 and 71,854.40

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Solution

The fourth proportional to 118,510.40, 177,880.80 and 71,854.40 is: 107,851.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,510.40 : 177,880.80 = 71,854.40 : x
  2. Step 2: Convert to fraction form
    118,510.40/177,880.80 = 71,854.40/x
  3. Step 3: Cross multiply
    118,510.40x = 177,880.80 × 71,854.40
  4. Step 4: Simplify right side
    118,510.40x = 12,781,518,155.52
  5. Step 5: Solve for x
    x = 12,781,518,155.52/118,510.40
  6. Step 6: Final answer
    x = 107,851.45

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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.