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Finding the Fourth Proportional to 85,698.60, 128,547.90 and 60,329.40

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Solution

The fourth proportional to 85,698.60, 128,547.90 and 60,329.40 is: 90,494.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,698.60 : 128,547.90 = 60,329.40 : x
  2. Step 2: Convert to fraction form
    85,698.60/128,547.90 = 60,329.40/x
  3. Step 3: Cross multiply
    85,698.60x = 128,547.90 × 60,329.40
  4. Step 4: Simplify right side
    85,698.60x = 7,755,217,678.26
  5. Step 5: Solve for x
    x = 7,755,217,678.26/85,698.60
  6. Step 6: Final answer
    x = 90,494.10

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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.