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Finding the Fourth Proportional to 118,779.60, 177,823.80 and 72,008.40

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Solution

The fourth proportional to 118,779.60, 177,823.80 and 72,008.40 is: 107,803.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,779.60 : 177,823.80 = 72,008.40 : x
  2. Step 2: Convert to fraction form
    118,779.60/177,823.80 = 72,008.40/x
  3. Step 3: Cross multiply
    118,779.60x = 177,823.80 × 72,008.40
  4. Step 4: Simplify right side
    118,779.60x = 12,804,807,319.92
  5. Step 5: Solve for x
    x = 12,804,807,319.92/118,779.60
  6. Step 6: Final answer
    x = 107,803.09

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1.5x scale

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.