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Finding the Fourth Proportional to 78,535.95, 116,915.67 and 78,068.88

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Solution

The fourth proportional to 78,535.95, 116,915.67 and 78,068.88 is: 116,220.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,535.95 : 116,915.67 = 78,068.88 : x
  2. Step 2: Convert to fraction form
    78,535.95/116,915.67 = 78,068.88/x
  3. Step 3: Cross multiply
    78,535.95x = 116,915.67 × 78,068.88
  4. Step 4: Simplify right side
    78,535.95x = 9,127,475,411.35
  5. Step 5: Solve for x
    x = 9,127,475,411.35/78,535.95
  6. Step 6: Final answer
    x = 116,220.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.