Home / 130,890.95-180,624.74-79,988.89

Finding the Fourth Proportional to 130,890.95, 180,624.74 and 79,988.89

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Solution

The fourth proportional to 130,890.95, 180,624.74 and 79,988.89 is: 110,381.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,890.95 : 180,624.74 = 79,988.89 : x
  2. Step 2: Convert to fraction form
    130,890.95/180,624.74 = 79,988.89/x
  3. Step 3: Cross multiply
    130,890.95x = 180,624.74 × 79,988.89
  4. Step 4: Simplify right side
    130,890.95x = 14,447,971,156.07
  5. Step 5: Solve for x
    x = 14,447,971,156.07/130,890.95
  6. Step 6: Final answer
    x = 110,381.74

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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.