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Finding the Fourth Proportional to 78,686.70, 118,030.05 and 75,624.90

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Solution

The fourth proportional to 78,686.70, 118,030.05 and 75,624.90 is: 113,437.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,686.70 : 118,030.05 = 75,624.90 : x
  2. Step 2: Convert to fraction form
    78,686.70/118,030.05 = 75,624.90/x
  3. Step 3: Cross multiply
    78,686.70x = 118,030.05 × 75,624.90
  4. Step 4: Simplify right side
    78,686.70x = 8,926,010,728.25
  5. Step 5: Solve for x
    x = 8,926,010,728.25/78,686.70
  6. Step 6: Final answer
    x = 113,437.35

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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.