Home / 78,155.15-107,853.95-42,346.13

Finding the Fourth Proportional to 78,155.15, 107,853.95 and 42,346.13

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Solution

The fourth proportional to 78,155.15, 107,853.95 and 42,346.13 is: 58,437.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,155.15 : 107,853.95 = 42,346.13 : x
  2. Step 2: Convert to fraction form
    78,155.15/107,853.95 = 42,346.13/x
  3. Step 3: Cross multiply
    78,155.15x = 107,853.95 × 42,346.13
  4. Step 4: Simplify right side
    78,155.15x = 4,567,196,954.31
  5. Step 5: Solve for x
    x = 4,567,196,954.31/78,155.15
  6. Step 6: Final answer
    x = 58,437.57

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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.