Home / 103,430.40-155,145.60-77,186.40

Finding the Fourth Proportional to 103,430.40, 155,145.60 and 77,186.40

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Solution

The fourth proportional to 103,430.40, 155,145.60 and 77,186.40 is: 115,779.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,430.40 : 155,145.60 = 77,186.40 : x
  2. Step 2: Convert to fraction form
    103,430.40/155,145.60 = 77,186.40/x
  3. Step 3: Cross multiply
    103,430.40x = 155,145.60 × 77,186.40
  4. Step 4: Simplify right side
    103,430.40x = 11,975,130,339.84
  5. Step 5: Solve for x
    x = 11,975,130,339.84/103,430.40
  6. Step 6: Final answer
    x = 115,779.60

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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.