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Finding the Fourth Proportional to 113,762.10, 170,643.15 and 78,332.70

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Solution

The fourth proportional to 113,762.10, 170,643.15 and 78,332.70 is: 117,499.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,762.10 : 170,643.15 = 78,332.70 : x
  2. Step 2: Convert to fraction form
    113,762.10/170,643.15 = 78,332.70/x
  3. Step 3: Cross multiply
    113,762.10x = 170,643.15 × 78,332.70
  4. Step 4: Simplify right side
    113,762.10x = 13,366,938,676.01
  5. Step 5: Solve for x
    x = 13,366,938,676.01/113,762.10
  6. Step 6: Final answer
    x = 117,499.05

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1.5x scale

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.