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Finding the Fourth Proportional to 61,209.60, 91,814.40 and 42,547.20

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Solution

The fourth proportional to 61,209.60, 91,814.40 and 42,547.20 is: 63,820.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,209.60 : 91,814.40 = 42,547.20 : x
  2. Step 2: Convert to fraction form
    61,209.60/91,814.40 = 42,547.20/x
  3. Step 3: Cross multiply
    61,209.60x = 91,814.40 × 42,547.20
  4. Step 4: Simplify right side
    61,209.60x = 3,906,445,639.68
  5. Step 5: Solve for x
    x = 3,906,445,639.68/61,209.60
  6. Step 6: Final answer
    x = 63,820.80

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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.