Home / 78,509.23-108,343.24-42,699.50

Finding the Fourth Proportional to 78,509.23, 108,343.24 and 42,699.50

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Solution

The fourth proportional to 78,509.23, 108,343.24 and 42,699.50 is: 58,925.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,509.23 : 108,343.24 = 42,699.50 : x
  2. Step 2: Convert to fraction form
    78,509.23/108,343.24 = 42,699.50/x
  3. Step 3: Cross multiply
    78,509.23x = 108,343.24 × 42,699.50
  4. Step 4: Simplify right side
    78,509.23x = 4,626,202,176.38
  5. Step 5: Solve for x
    x = 4,626,202,176.38/78,509.23
  6. Step 6: Final answer
    x = 58,925.58

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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.