Home / 287,430,761.60-431,146,142.40-105,640,323.20

Finding the Fourth Proportional to 287,430,761.60, 431,146,142.40 and 105,640,323.20

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Solution

The fourth proportional to 287,430,761.60, 431,146,142.40 and 105,640,323.20 is: 158,460,484.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,430,761.60 : 431,146,142.40 = 105,640,323.20 : x
  2. Step 2: Convert to fraction form
    287,430,761.60/431,146,142.40 = 105,640,323.20/x
  3. Step 3: Cross multiply
    287,430,761.60x = 431,146,142.40 × 105,640,323.20
  4. Step 4: Simplify right side
    287,430,761.60x = 45,546,417,829,569,224
  5. Step 5: Solve for x
    x = 45,546,417,829,569,224/287,430,761.60
  6. Step 6: Final answer
    x = 158,460,484.80

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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.