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Finding the Fourth Proportional to 85,618.79, 118,070.54 and 77,208.72

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Solution

The fourth proportional to 85,618.79, 118,070.54 and 77,208.72 is: 106,472.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,618.79 : 118,070.54 = 77,208.72 : x
  2. Step 2: Convert to fraction form
    85,618.79/118,070.54 = 77,208.72/x
  3. Step 3: Cross multiply
    85,618.79x = 118,070.54 × 77,208.72
  4. Step 4: Simplify right side
    85,618.79x = 9,116,075,263.11
  5. Step 5: Solve for x
    x = 9,116,075,263.11/85,618.79
  6. Step 6: Final answer
    x = 106,472.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.