Home / 78,358.08-108,131.36-42,547.35

Finding the Fourth Proportional to 78,358.08, 108,131.36 and 42,547.35

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Solution

The fourth proportional to 78,358.08, 108,131.36 and 42,547.35 is: 58,713.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,358.08 : 108,131.36 = 42,547.35 : x
  2. Step 2: Convert to fraction form
    78,358.08/108,131.36 = 42,547.35/x
  3. Step 3: Cross multiply
    78,358.08x = 108,131.36 × 42,547.35
  4. Step 4: Simplify right side
    78,358.08x = 4,600,702,607.16
  5. Step 5: Solve for x
    x = 4,600,702,607.16/78,358.08
  6. Step 6: Final answer
    x = 58,713.83

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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.