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Finding the Fourth Proportional to 78,646.71, 117,988.70 and 34,281.39

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Solution

The fourth proportional to 78,646.71, 117,988.70 and 34,281.39 is: 51,430.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,646.71 : 117,988.70 = 34,281.39 : x
  2. Step 2: Convert to fraction form
    78,646.71/117,988.70 = 34,281.39/x
  3. Step 3: Cross multiply
    78,646.71x = 117,988.70 × 34,281.39
  4. Step 4: Simplify right side
    78,646.71x = 4,044,816,468.89
  5. Step 5: Solve for x
    x = 4,044,816,468.89/78,646.71
  6. Step 6: Final answer
    x = 51,430.21

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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.