Home / 103,545.64-142,941.12-78,062.36

Finding the Fourth Proportional to 103,545.64, 142,941.12 and 78,062.36

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Solution

The fourth proportional to 103,545.64, 142,941.12 and 78,062.36 is: 107,762.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,545.64 : 142,941.12 = 78,062.36 : x
  2. Step 2: Convert to fraction form
    103,545.64/142,941.12 = 78,062.36/x
  3. Step 3: Cross multiply
    103,545.64x = 142,941.12 × 78,062.36
  4. Step 4: Simplify right side
    103,545.64x = 11,158,321,168.24
  5. Step 5: Solve for x
    x = 11,158,321,168.24/103,545.64
  6. Step 6: Final answer
    x = 107,762.35

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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.