Home / 78,428.04-117,647.18-57,430.92

Finding the Fourth Proportional to 78,428.04, 117,647.18 and 57,430.92

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Solution

The fourth proportional to 78,428.04, 117,647.18 and 57,430.92 is: 86,150.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,428.04 : 117,647.18 = 57,430.92 : x
  2. Step 2: Convert to fraction form
    78,428.04/117,647.18 = 57,430.92/x
  3. Step 3: Cross multiply
    78,428.04x = 117,647.18 × 57,430.92
  4. Step 4: Simplify right side
    78,428.04x = 6,756,585,782.81
  5. Step 5: Solve for x
    x = 6,756,585,782.81/78,428.04
  6. Step 6: Final answer
    x = 86,150.13

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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.