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Finding the Fourth Proportional to 78,066.40, 117,070.80 and 25,477.60

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Solution

The fourth proportional to 78,066.40, 117,070.80 and 25,477.60 is: 38,207.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,066.40 : 117,070.80 = 25,477.60 : x
  2. Step 2: Convert to fraction form
    78,066.40/117,070.80 = 25,477.60/x
  3. Step 3: Cross multiply
    78,066.40x = 117,070.80 × 25,477.60
  4. Step 4: Simplify right side
    78,066.40x = 2,982,683,014.08
  5. Step 5: Solve for x
    x = 2,982,683,014.08/78,066.40
  6. Step 6: Final answer
    x = 38,207.00

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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.