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Finding the Fourth Proportional to 218,779.62, 301,943.37 and 128,170.16

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Solution

The fourth proportional to 218,779.62, 301,943.37 and 128,170.16 is: 176,890.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,779.62 : 301,943.37 = 128,170.16 : x
  2. Step 2: Convert to fraction form
    218,779.62/301,943.37 = 128,170.16/x
  3. Step 3: Cross multiply
    218,779.62x = 301,943.37 × 128,170.16
  4. Step 4: Simplify right side
    218,779.62x = 38,700,130,211.18
  5. Step 5: Solve for x
    x = 38,700,130,211.18/218,779.62
  6. Step 6: Final answer
    x = 176,890.93

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1.5x scale

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.