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Finding the Fourth Proportional to 78,466.79, 117,700.23 and 19,303.58

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Solution

The fourth proportional to 78,466.79, 117,700.23 and 19,303.58 is: 28,955.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,466.79 : 117,700.23 = 19,303.58 : x
  2. Step 2: Convert to fraction form
    78,466.79/117,700.23 = 19,303.58/x
  3. Step 3: Cross multiply
    78,466.79x = 117,700.23 × 19,303.58
  4. Step 4: Simplify right side
    78,466.79x = 2,272,035,805.82
  5. Step 5: Solve for x
    x = 2,272,035,805.82/78,466.79
  6. Step 6: Final answer
    x = 28,955.38

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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.